Editing AR-15 variants

This article will help summarize the many variations on the [[AR-15]] family of weapons.  Weapons patterned off of the original [[ArmaLite]] AR-15 have been produced by numerous manufactures and have been used by nations around the world, some of which created their own variations.  The tables here are split in a variety of helpful categories, and should help to provide a basic overview of the litany of different subtypes. For purposes of these tables, '''bold''' model numbers are weapons used (or previously used) by the U.S. Military while ''italic'' model numbers are weapons for commercial or export sale. See ''[[AR-15 variants#Glossary of terms|Glossary of terms]]'' for an explanation of each column.

==Numbered Colt military models==
[[Colt's Manufacturing Company|Colt]] has been the most visible producer of weapons of the AR-15 pattern, and the military designation M16 is heavily associated with the company.  Colt has an intricate internal nomenclature system for its models, with a variety of suffixes and prefixes.  Colt’s systems have generally followed the times and though its model numbers originally came without prefixes, with the need to separate weapons made for civilian consumption from those made for military and law enforcement use, military models became prefixed with the code “RO.”  For the purposes of this table, the RO nomenclature is obviated as this terminology did not exist in all cases, but it can be understood to be present.  Military/LE models are also easily identified by their three digit code in contrast to the four digit codes for civilian weapons.

{| border="1"
|- style="background:gainsboro"
!Colt model no.
!Name
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|'''601'''
|'''[[M16 rifle|AR-15]]'''
|A1
|S-1-F
|A1
|No
|No
|20 in.
|A1
|1:14
|Triangular
|Yes
|Type 1 Duckbill/Type 2 Duckbill
|-
|'''602'''
|'''[[M16 rifle|AR-15]]'''
|A1
|S-1-F
|A1
|No
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|Type 2 Duckbill
|-
|'''603'''
|'''[[M16 rifle|XM16E1]]'''
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|Type 2 Duckbill
|-
|'''603'''
|'''[[M16 rifle|M16A1]]'''
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|'''604'''
|'''[[M16 rifle|M16 (No XM16 designation)]]'''
|A1
|S-1-F
|A1
|No
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|'''605'''
|[[CAR-15|CAR-15 Carbine]]
|A1
|S-1-F
|A1
|No
|No
|15 in.
|A1
|1:12
|Triangular
|No
|Type 2 Duckbill
|-
|'''605A'''
|[[CAR-15|CAR-15 Carbine]]
|A1
|S-1-F
|A1
|Yes
|No
|15 in.
|A1
|1:12
|Triangular
|No
|Type 2 Duckbill
|-
|605B
|[[CAR-15|CAR-15 Carbine]]
|A1
|S-F-1-3
|A1
|No
|No
|15 in.
|A1
|1:12
|Triangular
|No
|Type 2 Duckbill
|-
|606
|[[CAR-15|CAR-15 Heavy Assault Rifle M1]]
|A1
|S-1-F
|A1
|No
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|Type 2 Duckbill
|-
|606A
|[[CAR-15|CAR-15 Heavy Assault Rifle M1]]
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|Type 2 Duckbill
|-
|606B
|[[CAR-15|CAR-15 Heavy Assault Rifle M1]]
|A1
|S-F-1-3
|A1
|Yes
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|Type 2 Duckbill
|-
|'''607'''
|[[CAR-15|CAR-15 SMG]]
|1st Generation
|S-1-F
|A1
|No
|No
|10 in.
|A1
|1:12
|Short Triangular
|No
|Type 1 and 2 Duckbill and 3.5" Moderator
|-
|'''607A'''
|[[CAR-15|CAR-15 SMG]]
|1st Generation
|S-1-F
|A1
|Yes
|No
|10 in.
|A1
|1:12
|Short Triangular
|No
|Type 1 and 2 Duckbill and 3.5" Moderator
|-
|607B
|[[CAR-15|CAR-15 SMG]]
|1st Generation
|S-F-1-3
|A1
|No
|No
|10 in.
|A1
|1:12
|Short Triangular
|No
|Type 1 and 2 Duckbill and 3.5" Moderator
|-
|608
|[[CAR-15|CAR-15 Survival Rifle]]
|Tubular
|S-1-F
|A1
|No
|No
|10 in.
|A1
|1:12
|Short Round
|No
|Conical or 3.5" Moderator
|-
|'''609'''
|[[CAR-15|'''XM177E1''']]
|2nd Generation
|S-1-F
|A1
|Yes
|No
|10 in.
|A1
|1:12
|Short Ribbed
|No
|3.5" or 4.5" Moderator
|-
|'''610'''
|[[CAR-15|'''XM177''' or '''GAU-5/A''']]
|2nd Generation
|S-1-F
|A1
|No
|No
|10 in.
|A1
|1:12
|Short Ribbed
|No
|3.5" or 4.5" Moderator
|-
|610B
|[[CAR-15|CAR-15 SMG]]
|2nd Generation
|S-F-1-3
|A1
|No
|No
|10 in.
|A1
|1:12
|Short Ribbed
|No
|3.5" or 4.5" Moderator
|-
|''611''
|[[M16A1|M16 HBAR]]
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|A1
|-
|''611P''
|[[M16A1|M16 HBAR]] (License produced by Elisco Tools)
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|A1
|-
|''613''
|[[M16A1|M16]]
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|''613P''
|[[M16A1|M16]] (License produced by Elisco Tools)
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|''614''
|[[M16A1|M16]]
|A1
|S-1-F
|A1
|No
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|''614S'' 
|[[M16A1|M16]] (License produced by Chartered Arms Singapore)
|A1
|S-1-F
|A1
|No
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|''615''
|[[M16A1|M16 HBAR]]
|A1
|S-1-F
|A1
|No
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|A1
|-
|'''616'''
|[[M16A1|M16 HBAR]]
|A1
|S-1-F
|A1
|No
|No
|20 in.
|HBAR
|1:12
|Round
|Yes
|A1
|-
|''619''
|[[CAR-15|XM177E1]]
|2nd Generation
|S-1-F
|A1
|Yes
|No
|10 in.
|A1
|1:12
|Short Ribbed
|No
|3.5" or 4.5" Moderator
|-
|''620''
|[[XM177|CAR-15]]
|2nd Generation
|S-1-F
|A1
|No
|No
|10 in.
|A1
|1:12
|Short Ribbed
|No
|3.5" or 4.5" Moderator
|-
|'''621'''
|[[M16A1|M16A1 HBAR]]
|A1
|S-1-F
|A1
|Yes
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|A1
|-
|'''629'''
|[[CAR-15|'''XM177E2''']]
|2nd Generation
|S-1-F
|A1
|Yes
|No
|11.5 in.
|A1
|1:12
|Short Ribbed
|No
|4.5" Moderator
|-
|'''630'''
|[[CAR-15|'''GAU-5A/A''']]
|2nd Generation
|S-1-F
|A1
|No
|No
|11.5 in.
|A1
|1:12
|Short Ribbed
|No
|4.5" Moderator
|-
|633
|[[Colt 9mm smg|Colt SMG]]
|2nd Generation
|S-1-F
|A1
|No
|Yes
|7 in.
|A1
|1:10
|Short Round
|No
|None
|-
|634
|[[Colt 9mm smg|Colt SMG]]
|2nd Generation
|Conflict between S-1 and S-1-F
|A1
|No
|Yes
|10 in.
|A1
|1:10
|Short Ribbed
|No
|A2
|-
|635
|[[Colt 9mm smg|Colt SMG]]
|2nd, 3rd, or 4th Generation
|S-1-F
|A1
|No
|Yes
|10 in.
|A1
|1:10
|Short Ribbed
|No
|A2
|-
|635S
|[[Colt 9mm smg|Colt SMG]]
|2nd Generation
|S-1-F
|A1
|No
|Yes
|10 in.
|A1 w/ integral [[Suppressor|silencer]]
|1:10
|Short Ribbed
|No
|A2
|-
|''639''
|[[CAR-15|XM177E2]]
|2nd Generation
|S-1-F
|A1
|Yes
|No
|11.5 in.
|A1
|1:12
|Short Ribbed
|No
|4.5" Moderator or A1
|-
|639
|[[Colt 9mm smg|Colt SMG]]
|2nd
|S-1-3
|A1
|No
|Yes
|10 in.
|A1 w/ integral [[Suppressor|silencer]]
|1:10
|Short Ribbed
|No
|A2
|-
|''640''
|[[CAR-15|XM177E2]]
|2nd Generation
|S-1-F
|A1
|No
|No
|11.5 in.
|A1
|1:12
|Short Ribbed
|No
|4.5" Moderator or A1
|-
|'''645'''
|[[M16 rifle|'''M16A1E1/M16A2''']]
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|'''645E'''
|[[M16 rifle|'''M16A2E1''']]
|Flattop (w/ flip down front sight)
|S-1-3
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|'''646'''
|[[M16 rifle|'''M16A2E3/M16A3''']]
|A2
|S-1-F
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|'''649'''
|[[CAR-15|'''GAU-5A/A''']]
|2nd Generation
|S-1-F
|A1
|No
|No
|11.5 in.
|A1
|1:12
|Short Ribbed
|No
|4.5" Moderator
|-
|650
|[[M16A1|M16A1 carbine]]
|A1
|S-1-F
|A1
|Yes
|No
|14.5 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|''651''
|[[M16A1|M16A1 carbine]]
|A1
|S-1-F
|A1
|Yes
|No
|14.5 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|''652''
|[[M16A1|M16A1 carbine]]
|A1
|S-1-F
|A1
|No
|No
|14.5 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|'''''653'''''
|[[CAR-15|M16A1 carbine]]
|2nd Generation
|S-1-F
|A1
|Yes
|No
|14.5 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|''653P''
|[[M16A1|M16A1 carbine]] (License produced by Elisco Tools)
|2nd Generation
|S-1-F
|A1
|Yes
|No
|14.5 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|''654''
|[[M16A1|M16A1 carbine]]
|2nd Generation
|S-1-F
|A1
|No
|No
|14.5 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|'''655'''
|[[M16 rifle|'''M16A1 Special High Profile''']]
|A1
|S-1-F
|A1 (used with special raised carry handle scope mount)
|Yes
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|A1
|-
|'''656'''
|[[M16 rifle|'''M16A1 Special Low Profile''']]
|A1
|S-1-F
|Flattop
|Yes
|No
|20 in.
|HBAR
|1:12
|Triangular
|Yes
|A1
|-
|''701''
|[[M16A1|M16A2]]
|A2
|S-1-F
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|''702''
|[[M16A1|M16A2]]
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|''703''
|[[M16A1|M16A2]]
|A2
|S-1-F
|A2
|Yes
|Yes
|20 in.
|A1
|1:7
|Ribbed
|Yes
|A2
|-
|''705''
|[[M16A1|M16A2]]
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|''707''
|[[M16A1|M16A2]]
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|A1
|1:7
|Ribbed
|Yes
|A2
|-
|''711''
|[[M16A1|M16A2]]
|A2
|S-1-F
|A1
|Yes
|No and Yes
|20 in.
|A1
|1:7
|Ribbed
|Yes
|A2
|-
|''713''
|[[M16A1|M16A2]]
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|''715''
|[[M16A1|M16A2]] (License produced by [[Diemaco]]/[[Colt Canada]] as the [[Colt Canada C7 rifle|C7]])
|A2
|S-1-F
|A1
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|''719''
|[[M16A1|M16A2]]
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|A1
|1:7
|Ribbed
|Yes
|A2
|-
|'''720'''
|[[M4 Carbine|'''XM4 Carbine''']]
|3rd Generation
|S-1-3
|A2
|Yes
|Yes
|14.5 in.
|M4
|1:7
|Short Ribbed
|Yes
|A2
|-
|'''''723'''''
|[[M16A1|M16A2 carbine]]
|3rd Generation
|S-1-F
|A1
|Yes
|Yes
|14.5 in.
|A1
|1:7
|Short Ribbed
|Yes
|A1
|-
|''725''
|[[M16A1|M16A2 carbine]] (License produced by [[Diemaco]]/[[Colt Canada]] as the [[Colt Canada C7 rifle|C8]])
|3rd Generation
|S-1-F
|A1
|Yes
|Yes
|14.5 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|''725A''
|[[M16A1|M16A2 carbine]]
|3rd Generation
|S-1-F
|A1
|Yes
|Yes
|14.5 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|''725B''
|[[M16A1|M16A2 carbine]]
|3rd Generation
|S-1-F
|A1
|Yes
|Yes
|14.5 in.
|A2
|1:7
|Short Ribbed
|Yes
|A2
|-
|''726''
|[[M16A1|M16A2 carbine]]
|3rd Generation
|S-1-F
|A1
|Yes
|Yes
|14.5 in.
|A1
|1:7
|Short Ribbed
|Yes
|A1
|-
|'''''727'''''
|[[M16A1|M16A2 carbine]]
|3rd Generation
|S-1-F
|A2
|Yes
|Yes
|14.5 in.
|M4
|1:7
|Short Ribbed
|Yes
|A2
|-
|''728''
|[[M16A1|M16A2 carbine]]
|3rd Generation
|S-1-F
|A2
|Yes
|Yes
|14.5 in.
|M4
|1:7
|Short Ribbed
|Yes
|A2
|-
|733
|[[M16A1|M16A2 Commando]]/[[CAR-15|M4 Commando]]
|3rd or 4th Generation
|S-1-F
|A1 or A2
|Yes
|Yes or No
|11.5 in.
|A1 or A2
|1:7
|Short Ribbed
|No
|A1 or A2
|-
|733A
|[[M16A1|M16A2 Commando]]/[[CAR-15|M4 Commando]]
|3rd or 4th Generation
|S-1-3
|A1 or A2
|Yes
|Yes or No
|11.5 in.
|A1 or A2
|1:7
|Short Ribbed
|No
|A1 or A2
|-
|734
|[[M16A1|M16A2 Commando]]
|3rd Generation
|S-1-F
|A1 or A2
|Yes
|Yes or No
|11.5 in.
|A1 or A2
|1:7
|Short Ribbed
|No
|A1 or A2
|-
|734A
|[[M16A1|M16A2 Commando]]
|3rd Generation
|S-1-3
|A1 or A2
|Yes
|Yes or No
|11.5 in.
|A1 or A2
|1:7
|Short Ribbed
|No
|A1 or A2
|-
|735
|[[M16A1|M16A2 Commando]]/[[CAR-15|M4 Commando]]
|3rd or 4th Generation
|S-1-3
|A1 or A2
|Yes
|Yes or No
|11.5 in.
|A1 or A2
|1:7
|Short Ribbed
|No
|A1 or A2
|-
|''737''
|[[M16A1|M16A2]]
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|''738''
|[[CAR-15|M4 Commando Enhanced]]
|4th Generation
|S-1-3-F
|A2
|Yes
|Yes
|11.5 in.
|A2
|1:7
|Short Ribbed
|No
|A1 or A2
|-
|''741''
|[[M16A1|M16A2]]
|A2
|S-1-F
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|''742''
|[[M16A1|M16A2]] (Standard w/ bipod)
|A2
|S-1-F
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|''745''
|[[M16A1|M16A2]] (Standard w/ bipod)
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|''746''
|[[M16A1|M16A2]] (Standard w/ bipod)
|A2
|S-1-3
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|''750''
|[[Colt Automatic Rifle|LMG]] (Colt/[[Diemaco]] project)
|A2
|S-F
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Square LMG
|Yes
|A2
|-
|''777''
|[[M4 Carbine]]
|4th Generation
|S-1-3
|A2
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|''778''
|[[M4 Carbine|M4 Carbine Enhanced]]
|4th Generation
|S-1-3-F
|A2
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|''779''
|[[M4 Carbine]]
|4th Generation
|S-1-F
|A2
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|''901''
|[[M16A1|M16A3]]
|A2
|S-1-F
|Flattop
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|''905''
|[[M16A1|M16A3]]
|A2
|S-1-3
|Flattop
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|'''920'''
|'''[[M4 Carbine]]'''
|3rd and 4th Generation
|S-1-3
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|'''921'''
|'''[[M4 Carbine|M4E1/A1 Carbine]]'''
|4th Generation
|S-1-F
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|'''921HB'''
|'''[[M4 Carbine|M4A1 Carbine]]'''
|4th Generation
|S-1-F
|Flattop
|Yes
|Yes
|14.5 in.
|M4 HBAR
|1:7
|M4
|Yes
|A2
|-
|'''925'''
|'''[[M4 Carbine|M4E2 Carbine]]'''
|3rd or 4th Generation
|S-1-3
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|927
|[[M4 Carbine]]
|4th Generation
|S-1-F
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|933
|[[CAR-15|M4 Commando]]
|4th Generation
|S-1-F
|Flattop
|Yes
|Yes
|11.5 in.
|A1 or A2
|1:7
|Short Ribbed
|No
|A2
|-
|935
|[[CAR-15|M4 Commando]]
|4th Generation
|S-1-3
|Flattop
|Yes
|Yes
|11.5 in.
|A1 or A2
|1:7
|Short Ribbed
|No
|A2
|-
|''938''
|[[CAR-15|M4 Commando Enhanced]]
|4th Generation
|S-1-3-F
|Flattop
|Yes
|Yes
|11.5 in.
|A2
|1:7
|M4
|No
|A2
|-
|''977''
|[[M4 Carbine]]
|4th Generation
|S-1-3
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|''941''
|[[M16A1|M16A3]]
|A2
|S-1-F
|Flattop
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|''942''
|[[M16A1|M16A3]] (Standard w/ bipod)
|A2
|S-1-F
|Flattop
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|'''945'''
|[[M16 rifle|'''M16A2E4/M16A4''']]
|A2
|S-1-3
|Flattop
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|''950''
|[[Colt Automatic Rifle|LMG]] (Colt/[[Diemaco]] project)
|A2
|S-F
|Flattop
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Square LMG
|Yes
|A2
|-
|''978''
|[[M4 Carbine|M4 Carbine Enhanced]]
|4th Generation
|S-1-3-F
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|''979''
|[[M4 Carbine]]
|4th Generation
|S-1-F
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|}

==Numbered Colt civilian models==
Colt’s civilian line is identified by a four digit code following a specific prefix.  Initially all Colt civilian weapons were listed with an “R” prefix, with this changing to “AR” following the passage of the [[Federal Assault Weapons Ban]] in 1994.  Colt also produced a line of weapons aimed at target shooters under the “MT” prefix, which stood for Match Target, as well as, the Colt Accurized Rifle, which was the only model to feature the CR prefix.  Most recently with the shift in marketing policy by [[Colt Defense]], these weapons have been given the “LE” prefix.  Currently, Colt Defense has no line targeted specifically at the private civilian market.

===R series models===

{| border="1"
|- style="background:gainsboro"
!Colt model no.
!Name
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|R6000
|AR-15 Sporter (SP1)
|A1
|S-1
|A1
|No
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|Type 2 Duckbill or A1
|-
|R6001
|AR-15 Sporter Carbine (SP1 Carbine)
|3rd Generation
|S-1
|A1
|No
|No
|16 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|R6002
|AR-15 Sporter (SP1; Bundled with 3x scope)
|A1
|S-1
|A1
|No
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|R6003
|AR-15 Sporter Carbine (SP1 Carbine; Bundled with 3x scope)
|3rd Generation
|S-1
|A1
|No
|No
|16 in.
|A1
|1:12
|Short Ribbed
|Yes
|A1
|-
|R6004
|AR-15 Sporter (SP1; Bundled with Colt Reflex Sighting System)
|A1
|S-1
|A1
|No
|No
|20 in.
|A1
|1:12
|Triangular
|Yes
|A1
|-
|R6420
|AR-15A2 Sporter II Carbine
|3rd Generation
|S-1
|A2
|Yes
|No
|16 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|R6430
|Sporter Lightweight (9mm)
|3rd Generation
|S-1
|A2
|No
|Yes
|16 in.
|A1
|1:10
|Short Ribbed
|Yes
|A2
|-
|R6450
|AR-15 9mm Carbine
|3rd Generation
|S-1
|A2
|No
|No
|16 in.
|A1
|1:10
|Short Ribbed
|Yes
|A2
|-
|R6500
|AR-15A2 Sporter II
|A2
|S-1
|A2
|Yes
|No
|20 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|R6510
|AR-15A2 Sporter II (Special export model in .222 Remington)
|A2
|S-1
|A2
|Yes
|No
|20 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|R6520
|AR-15A2 Government Carbine
|3rd Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|R6521
|AR-15A2 Government Carbine (Special export model with receiver block and large pin upper receiver)
|3rd Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|R6530
|Sporter Lightweight 
|3rd Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|A1
|1:7
|Short Ribbed
|No
|A2
|-
|R6550
|AR-15A2 Government
|A2
|S-1
|A2
|Yes
|No
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|R6550CC
|AR-15A2 Government (w/ factory camouflage finish)
|A2
|S-1
|A2
|Yes
|No
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|R6550K
|AR-15A2 Government (w/ factory installed .22 Long Rifle conversion kit)
|A2
|S-1
|A2
|Yes
|No
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|R6551
|Sporter Target
|A2
|S-1
|A2
|Yes
|No
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|R6600
|AR-15A2 HBAR
|A2
|S-1
|A2
|Yes
|No
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|R6600DH
|AR-15A2 Delta HBAR (bundled w/ Tasco 3-9x scope and cheekpiece)
|A2
|S-1
|A2
|Yes
|No
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|R6600K
|AR-15A2 HBAR (w/ factory installed .22 Long Rifle conversion kit)
|A2
|S-1
|A2
|Yes
|No
|20 in.
|HBAR
|1:7
|Ribbed
|Yes
|A2
|-
|R6601
|Sporter Match HBAR
|A2
|S-1
|A2
|Yes
|No
|20 in.
|HBAR
|1:7
|Ribbed
|No
|A2
|-
|R6601DH
|Sporter Match Delta HBAR (bundled w/ Tasco 3-9x scope and cheekpiece)
|A2
|S-1
|A2
|Yes
|No
|20 in.
|HBAR
|1:7
|Ribbed
|No
|A2
|-
|R6700
|Sporter Competition HBAR
|A2
|S-1
|Flattop
|Yes
|No
|20 in.
|HBAR
|1:9
|Ribbed
|No
|A2
|-
|R6700CH
|Sporter Competition HBAR (bundled w/ Tasco 3-9x scope and cheekpiece)
|A2
|S-1
|Flattop
|Yes
|No
|20 in.
|HBAR
|1:9
|Ribbed
|No
|A2
|-
|R6700S
|Sporter Competition HBAR (bundled w/ Tasco 3-9x scope)
|A2
|S-1
|Flattop
|Yes
|No
|20 in.
|HBAR
|1:9
|Ribbed
|No
|A2
|-
|R6701
|Sporter Competition HBAR (Special limited edition production run)
|A2
|S-1
|Flattop
|Yes
|Yes
|20 in.
|HBAR
|1:9
|Ribbed
|No
|A2
|-
|R6721
|AR-15A3 Tactical Carbine
|4rd Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|HBAR
|1:9
|Short Ribbed
|Yes
|A2
|-
|R6724
|Sporter Competition HBAR
|A2
|S-1
|Flattop
|Yes
|No
|24 in.
|HBAR
|1:9
|Ribbed
|No
|A2
|-
|R6731
|AR-15A3 Competition HBAR
|A2
|S-1
|A2
|Yes
|Yes
|16 in.
|HBAR
|1:9
|Short Ribbed
|No
|A2
|-
|R6750
|Sporter Competition HBAR (bundled w/ bipod)
|A2
|S-1
|A2
|Yes
|Yes
|20 in.
|Super-Heavy
|1:7
|Ribbed
|No
|A2
|-
|R6821
|Sporter Carbine (7.62x39mm)
|3rd Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|HBAR
|1:12
|Short Ribbed
|No
|A1
|-
|R6831
|Sporter Lightweight (7.62x39mm)
|3rd Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|A1
|1:12
|Short Ribbed
|No
|A1
|-
|}

===AR series models===

{| border="1"
|- style="background:gainsboro"
!Colt model no.
!Name
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|AR6320
|AR-15 Lightweight
|3rd Generation
|S-1
|A1
|Yes
|Yes
|20 in.
|A2
|1:9
|Short Ribbed
|No
|A2
|-
|AR6450
|AR-15 9mm Carbine
|4th Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|A2
|1:10
|Short Ribbed
|Yes
|A2
|-
|AR6520
|AR-15A2 Government Carbine
|4th Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|A2
|1:7
|Short Ribbed
|Yes
|A2
|-
|AR6520SP
|AR-15A2 Government Carbine
|4th Generation
|S-1
|A2
|Yes
|Yes
|10 in.
|A2
|1:7
|Short Ribbed
|Yes
|A2
|-
|AR6525
|AR-15A2 Government Carbine
|4th Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|A2
|1:9
|Short Ribbed
|Yes
|A2
|-
|AR6721
|AR-15A3 Tactical Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|16 in.
|HBAR
|1:9
|Short Ribbed
|Yes
|A2
|-
|AR6721SP
|AR-15A3 Tactical Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|10 in.
|HBAR
|1:9
|Short Ribbed
|Yes
|A2
|-
|}

===MT and CR series models===

{| border="1"
|- style="background:gainsboro"
!Colt model no.
!Name
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|CR6724
|Colt Accurized Rifle
|A2
|S-1
|Flattop
|Yes
|Yes
|24 in.
|Stainless HBAR
|1:9
|FF Tube
|No
|A2
|-
|MT6400
|Match Target M4
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|16 in.
|M4
|1:7
|M4
|No
|None
|-
|MT6400C
|Match Target M4
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|16 in.
|M4
|1:7
|M4
|No
|Factory compensator
|-
|MT6530
|Match Target Lightweight 
|A2
|S-1
|A2
|Yes
|Yes
|16 in.
|A1
|1:7
|Short Ribbed
|No
|None
|-
|MT6551
|Match Target Rifle
|A2
|S-1
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|No
|None
|-
|MT6601
|Match Target HBAR
|A2
|S-1
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|No
|None
|-
|MT6601C
|Match Target HBAR
|A2
|S-1
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Ribbed
|No
|Factory compensator
|-
|MT6700
|Match Target Competition HBAR
|A2
|S-1
|Flattop
|Yes
|No
|20 in.
|HBAR
|1:9
|Ribbed
|No
|None
|-
|MT6700C
|Match Target Competition HBAR
|A2
|S-1
|Flattop
|Yes
|No
|20 in.
|HBAR
|1:9
|Ribbed
|No
|Factory compensator
|-
|MT6731
|Match Target Competition HBAR II
|A2
|S-1
|Flattop
|Yes
|Yes
|16 in.
|HBAR
|1:9
|Short Ribbed
|No
|None
|-
|MT6830
|AR-15A2 Government Carbine (Post-Ban LE Only)
|3rd Generation
|S-1
|A2
|Yes
|Yes
|16 in.
|HBAR
|1:12
|Short Ribbed
|Yes
|A2
|-
|}

===LE series models===

{| border="1"
|- style="background:gainsboro"
!Colt model no.
!Name
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|LE1020
|Gas Piston Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|16 in.
|M4
|1:7
|Rail System
|Yes
|A2
|-
|LE1033
|Gas Piston Commando
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|11.5 in.
|A2
|1:7
|Rail System
|Yes
|A2
|-
|LE6920
|Law Enforcement Carbine (Also produced under license by [[Colt Canada]])
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|16 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|LE6920HB
|Law Enforcement Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|16 in.
|M4 HBAR
|1:7
|M4
|Yes
|A2
|-
|LE6921
|M4LE Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|LE6921CQB
|M4LE Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|10.5 in.
|M4 HBAR
|1:7
|M4
|Yes
|A2
|-
|LE6921HB
|M4LE Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|14.5 in.
|M4 HBAR
|1:7
|M4
|Yes
|A2
|-
|LE6921SP
|M4LE Carbine
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|10 in.
|M4 HBAR
|1:7
|M4
|Yes
|A2
|-
|LE6933
|M4LE Commando
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|11.5 in.
|A2
|1:7
|Short Ribbed
|Yes
|A2
|-
|LE6941
|Law Enforcement Carbine (Direct Impingement version of LE1020)
|4th Generation
|S-1
|Flattop
|Yes
|Yes
|16 in.
|M4
|1:7
|Rail System
|Yes
|A2
|-
|}

==Colt military models without model numbers==
In rare instances some Colt models have been produced without in house model numbers, or at least one which is readily apparent. 

{| border="1"
|- style="background:gainsboro"
!Name
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|[[M16 rifle|'''M16 PIP/M16A1E1''']]
|A2
|S-1-F or S-1-3
|A2
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A1 or A2
|-
|[[M16 rifle|'''M16 ACR/M16A2E2''']]
|Retracable ACR
|S-1-3
|Flattop
|Yes
|Yes
|20 in.
|A2
|1:7
|ACR Type
|No
|ACR compensator
|-
|[[M231 Firing Port Weapon|'''XM231''']]
|FPW Wire
|S-F
|None
|No
|No
|15.6 in.
|A1
|1:12
|Short Round
|No
|A1
|-
|[[M231 Firing Port Weapon|'''M231''']]
|None
|S-F
|None
|No
|No
|15.6 in.
|A1
|1:12
|Short Round
|No
|A1
|-
|}

==Diemaco/Colt Canada models==
The Canadian company [[Colt Canada]] (formerly [[Diemaco]]) licensed production of a rifle (Colt Model 715) and carbine (Colt Model 725), but later went on to produce an entire line of AR-15/M16 pattern weapons developed independently.  In May 2005, Colt's Manufacturing Company acquired Diemaco, and the name was changed to Colt Canada.  

{| border="1"
|- style="background:gainsboro"
!Colt model no.
!Diemaco model
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|715
|[[Colt Canada C7 rifle|C7]]
|A2
|S-1-F
|A1
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|N/A
|[[Colt Canada C7 rifle|C7FT]]
|A2
|S-1-F
|Weaver
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|N/A
|[[Colt Canada C7 rifle|C7A2]]
|Canadian 3rd Generation
|S-1-F
|Weaver
|Yes
|Yes
|20 in.
|A2
|1:7
|Ribbed
|Yes
|A2
|-
|750
|[[Colt Automatic Rifle#The Colt.2FDiemaco LMG|Colt/Diemaco LMG/LSW]]
|A2
|S-F
|A2
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Square LMG
|No
|A2
|-
|N/A
|[[Diemaco C7#Diemaco LSW|LSW]]
|A2
|S-F
|Weaver
|Yes
|Yes
|20 in.
|HBAR
|1:7
|Square LMG
|No
|A2
|-
|725
|[[Colt Canada C7 rifle#C8|C8]]
|3rd Generation
|S-1-F
|A1
|Yes
|Yes
|14.5 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|N/A
|[[Colt Canada C7 rifle#C8A1|C8FT]]
|Canadian 3rd Generation
|S-1-F
|Weaver
|Yes
|Yes
|14.5 in.
|A1
|1:7
|Short Ribbed
|Yes
|A2
|-
|N/A
|[[Colt Canada C7 rifle#Other C8 variants|C8FTHB]]
|Canadian 3rd Generation
|S-1-F
|Weaver
|Yes
|Yes
|14.5 in.
|A2
|1:7
|Short Ribbed
|Yes
|A2
|-
|N/A
|[[Colt Canada C7 rifle#C8SFW|SFW]]
|Canadian 3rd Generation
|S-1-F
|Weaver
|Yes
|Yes
|14.5 in.
|SFW
|1:7
|Short Ribbed
|Yes
|A2
|-
|N/A
|[[Colt Canada C7 rifle#Other C8 variants|C8CQB]]
|Canadian 3rd Generation
|S-1-F
|Weaver
|Yes
|Yes
|10" in.
|A2
|1:7
|Short Ribbed
|Yes
|A2
|-
|N/A
|[[Colt Canada C7 rifle#Other C8 variants|PDW]]
|Canadian 3rd Generation
|S-1-F
|Weaver
|Yes
|Yes
|5.7" in.
|A2
|1:7
|N/A
|No
|A2
|-
|}

===Colt Canada model changes and comments===
When Diemaco became Colt Canada the marketing names for a number of products were changed, though some remained the same.  Those that changed are listed below, with comments on what major changes Colt Canada made the models.

{| border="1"
|- style="background:gainsboro"
!Diemaco model
!Colt Canada model
!Comments
|-
|C7FT
|C7A1
|Colt Canada offers this rifle with either a Weaver or MIL-STD-1913 rail type sight base
|-
|LSW
|LSW
|Colt Canada offers this rifle with either a Weaver or MIL-STD-1913 rail type sight base
|-
|C8FT
|C8A1
|Colt Canada offers this rifle with either a Weaver or MIL-STD-1913 rail type sight base
|-
|C8FTHB
|C8A2
|Colt Canada offers this rifle with either a Weaver or MIL-STD-1913 rail type sight base
|-
|SFW
|SFW
|Colt Canada offers this rifle with either a Weaver or MIL-STD-1913 rail type sight base
|-
|C8CQB
|CQB
|Colt Canada offers this rifle with either a Weaver or MIL-STD-1913 rail type sight base
|-
|}

==Non-factory military models==
{| border="1"
|- style="background:gainsboro"
!Name
!Base weapon
!Stock
!Fire control
!Rear sight
!Forward assist
!Case deflector
!Barrel length
!Barrel profile
!Barrel twist
!Hand guards
!Bayonet Lug
!Muzzle device
|-
|[[CAR-15#GUU-5.2FP|GUU-5/P]]
|GAU-5/A or GAU-5A/A
|2nd or 4th Generation
|S-1-F
|A1
|Yes
|No
|14.5 in.
|A1 or M4
|1:7
|Short Ribbed
|Yes
|A1 or A2
|-
|[[CAR-15#GUU-5.2FP|GUU-5/P]]
|GAU-5/A or GAU-5A/A
|2nd or 4th Generation
|S-1-F
|A2 or Flattop
|Yes
|Yes
|14.5 in.
|M4
|1:7
|M4
|Yes
|A2
|-
|Mekut'zar
|Model 653
|3rd Generation or Israeli
|S-1-F
|A1
|Yes
|No
|14.5 in.
|M4
|1:7
|Short Ribbed
|Yes
|A2
|-
|Mekut'zrar
|Model 653
|2nd Generation or Isaeli
|S-1-F
|A1
|Yes
|No
|Variable; 9" average
|A1
|1:12
|Short Ribbed
|No
|Various
|-
|}

==Glossary of terms==
====Stock====
''Fixed Stocks''
*''A1'': Fixed stock as used on M16 and M16A1. May or may not have a trapdoor to store a cleaning kit
*''A2'': Improved stock used on M16A2. Longer by 5/8"
*''Tubular'': Fixed tubular buttstock, similar to the 2nd Generation retractable unit, using a receiver extension and triangular rear with buttplate

''Retractable Stocks''
*''1st Generation'': 2-position sliding stock that resembled a shortened fixed buttstock
*''2nd Generation'': 2-position aluminum retractable stock
*''3rd Generation'': 2-position fiberlite retractable stock.  Introduced 1985
*''Canadian 3rd Generation'': 4-position fiberlite retractable stock fitted with rubber buttpad 
*''4th Generation'': 4-position nylon retractable stock.  Introduced 2002, designed by Picatinny Arsenal engineer Lily Ko with reinforced ribs, an angled buttplate, and a rear sling swivel
*''Retractable ACR'': Similar in design to the so-called "Crane Stock" (initially fabricated by the [[Naval Surface Warfare Center Crane Division]]) essentially a 3rd generation unit with integrated cheek-rest
*''FPW Wire'': Retractable wire stock similar in appearance to the stock used on the [[M3 submachine gun]]
*''Israeli'': Rebuilt 3rd Generation stocks with 6 positions instead of 2

====Fire control====
*''S-1'': The selector is Safe (S) - Semi-Automatic (1)
*''S-F'': The selector is Safe (S) - Fully Automatic (F)
*''S-1-F'': The selector is Safe (S) - Semi-Automatic (1) - Fully Automatic (F)
*''S-1-3'': The selector is Safe (S) - Semi-Automatic (1) - 3-Round Limiter (3)
*''S-F-1-3'': The selector is Safe (S) - Fully Automatic (F) - Semi-Automatic (1) - 3-Round Limiter (3).  First Generation 4 position group
*''S-1-3-F'': The selector is Safe (S) - Semi-Automatic (1) - 3-Round Limiter (3) - Fully Automatic (F).  Second Generation 4 position group

====Rear sight====
*''A1'': "Field sights" in which the rear sight is only adjustable for windage
*''A2'': Rear sight adjustable for both windage and elevation
*''Flattop'': Indicates carry handle and rear sight has been replaced with a MIL-STD-1913 rail. A detachable carry handle can be attached to the rail which features either A1 (Diemaco/Colt Canada) or A2 (Colt) sights
*''Weaver'': Indicates carry handle and rear sight has been replaced with a Weaver-type rail. A detachable carry handle can be attached to the rail which features either A1 (Diemaco/Colt Canada) or A2 (Colt) sights

====Barrel Profile====
*''A1'': Also referred to as the "lightweight" or "pencil" profile.  Original barrel profile where barrel diameter is between 0.675 and 0.575 inches
*''A2'': Also referred to as the "government" or "gov't" profile. Barrel profile for which the portion of the barrel in front of handguards is thickened to 0.715 inches
*''HBAR'': A barrel that in some portion is thicker than government-profile, usually underneath the handguards
*''M4'': Government barrel profile with small portion reduced to 0.575 inches to mount M203 grenade launcher
*''M4 HBAR'': M4 barrel with portion under handguard thickened for sustained automatic fire
*''Super Heavy'': Special Colt bull target/match barrel
*''SFW'': Special Forces Weapon profile, A2 profile with "fat" portion forward of the sight triangle

====Barrel twist====
*''1:14'': 1 right hand twist every 14 inches
*''1:12'': 1 right hand twist every 12 inches (305 mm)
*''1:10'': 1 right hand twist every 10 inches
*''1:9'': 1 right hand twist every 9 inches
*''1:7'': 1 right hand twist every 7 inches (177.8 mm)

====Handguards====
*''Triangular'': Triangular rifle handguards
*''Short Triangular'': Carbine length triangular handguards
*''Round'': Smooth round rifle handguards 
*''Short Round'': Carbine length smooth round handguard
*''Ribbed'': Ribbed round rifle handguards
*''Short Ribbed'': Carbine length ribbed handguards
*''Square LMG'': Special heavy handguards with integral vertical grip for use during sustained fire
*''FF Tube'': Free-Float Tube
*''M4'': Oval carbine handguards with double heatshields
*''Rail System'': Handguards are replaced with a [[Rail Integration System]]

====Muzzle device====
*''Type 1 Duckbill'': Original three-prong flash hider
*''Type 2 Duckbill'': Also referred to as "three prong." A larger three-prong flash hider
*''A1'': Also referred to as the "Birdcage" flash hider
*''A2'': Birdcage flash hider with bottom slots closed off to act as muzzle compensator and to prevent dust from being blown into the shooters face while in the prone position
*''3.5" Moderator'' or ''4.5" Moderator'': Either the 3.5-inch or 4.5-inch baffled moderators
*''Conical'': A conical flash suppressor
*''ACR Compensator'': Special anti-rise muzzle device developed specifically for the Colt ACR
*''Factory Compensator'': Colt Factory muzzle brake compliant with the restrictions of the 1994 [[Federal Assault Weapons Ban]]

==References==
*Bartocci, Christopher R. (2004). ''Black Rifle II: The M16 into the 21st Century''. Cobourg, Canada: Collector Grade Publications Inc.. ISBN 0-88935-348-4.
* Dockery, Kevin.  ''Special Warfare Special Weapons''.  Chicago, IL: Emperor's Press, 1997.  ISBN 1-883-47600-3.
* Gervasi, Tom.  ''Arsenal of Democracy III: America's War Machine, the Pursuit of Global Dominance''.  New York, NY: Grove Press, Inc, 1984.  ISBN 0-394-54102-2.
* Long, Duncan.  ''The Complete AR-15/M16 Sourcebook''.  Boulder, CO: Paladin Press, 2001.  ISBN 0-87364-687-8.
*Stevens, R. Blake; Edward C. Ezell [1987] (2004). ''The Black Rifle: M16 Retrospective'', Second Enhanced Edition, Modern U.S. Military Small Arms, Cobourg, Canada: Colector Grade Publications Inc.. ISBN 0-88935-115-5.
==See also==
* [[M16 rifle|M16]]
* [[M4 Carbine]]
* [[M231 Firing Port Weapon]]
* [[CAR-15]]
* [[Colt Automatic Rifle]]

[[Category:Assault rifles]]
[[Category:Colt]]
[[Category:5.56mm rifles]]
[[Category:Semi-automatic rifles]]