CAR-15
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The Colt Automatic Rifle-15 or CAR-15 is a family of M16 rifle–based firearms marketed by Colt in the 1960s and early 1970s. However, the term "CAR-15" is most commonly associated with the Colt Commando ; these select-fire carbines have ultrashort 10.5-inch (270 mm) and 11.5-inch (290 mm) barrels with over-sized flash suppressors.
GAU-5/A, USAF version of the XM177
U.S. Navy SEAL with Colt Commando. Note: large flash suppressor
The U.S. Army Ranger in the foreground is armed with an M-16 A1 carbine (Model 653).
A semi-auto Bushmaster Dissipator barrel which uses a similar short-barrel, standard length hand-guard concept to the CAR-15 Carbine
M16 rifle
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The M16 rifle is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-round magazine.
M16A2, multi-sided view
From top to bottom: M16A1, M16A2, M4A1, M16A4
3/1 Marine cleans his XM16E1 in December 1967
Front cover – The M16A1 Rifle – Operation and Preventive Maintenance by Will Eisner, issued to American soldiers in the Vietnam War.