Editing M16 rifle (section)

===Colt Commando (XM177 & GAU-5)===
{{Main|CAR-15}}
[[File:CCTwithGAU-5.jpg|thumb|upright|A USAF Combat Control Team member with a GAU-5 carbine and oversized flash suppressor]]

In Vietnam, some soldiers were issued a [[carbine]] version of the M16 named XM177. The XM177 had a shorter {{convert|10|in|mm|0|abbr=on}} barrel and a telescoping metal stock, which made it substantially lighter and more compact. It also possessed a combination flash hider/sound moderator to reduce the increased muzzle flash and loudened report. The Air Force's GAU-5/A (XM177) and the Army's XM177E1 variants differed over the latter's inclusion of a forward assist, although some GAU-5s do have the forward assist. The final Air Force GAU-5/A and Army XM177E2 had an {{convert|11.5|in|mm|0|abbr=on}} barrel with a longer flash/sound suppressor. The lengthening of the barrel was to support the attachment of Colt's own [[XM148 grenade launcher|XM148]] 40&nbsp;mm grenade launcher. These versions were also known as the Colt Commando model commonly referenced and marketed as the CAR-15. The variants were issued in limited numbers to special forces, helicopter crews, Air Force pilots, Air Force Security Police Military Working Dog (MWD) handlers, officers, radio operators, artillerymen, and troops other than front line riflemen. Some USAF GAU-5A/As were later equipped with even longer {{convert|14.5|in|mm|adj=on}} 1/12 rifled barrels as the two shorter versions were worn out. The {{convert|14.5|in|mm|adj=on}} barrel allowed the use of MILES gear and for bayonets to be used with the sub-machine guns (as the Air Force described them). By 1989, the Air Force started to replace the earlier barrels with 1/7 rifled models for use with the M855-round. The weapons were given the redesignation of GUU-5/P.

These were used by the British Special Air Service during the Falklands War.{{sfnp|Special Operations.Com ''SAS Weapons''|2000}}