Colt XM177E2 for sale
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Colt XM177e2 Retro 5.56 AR-15 Carbine - CRXM177E2
Brand:
Colt
Action:
Semi-Auto
Barrel Length:
16.1"
Caliber:
.223 Rem/5.56×45mm NATO
Capacity:
20
Finish Per Color:
Black
Frequently Asked Questions
Colt XM177E2 for sale
When was the Colt XM177 made?
Colt introduced the XM177 in 1966 following an Army contract signed that June, with first deliveries in November 1966. Production continued through the late 1960s, ending around 1970. It was developed for special operations and jungle warfare during the Vietnam War.
What is the difference between XM177E1 and XM177E2?
The XM177E1 had a bolt assist and an 11.5-inch barrel. The XM177E2 also retained the bolt assist but used a slightly longer barrel and a different flash suppressor. The E2 became the standard version around 1967, replacing the E1 in special operations use.
What is the effective range of the XM177?
The XM177's effective range was approximately 200 meters. Its shortened 11.5-inch barrel reduced muzzle velocity from around 3,250 ft/s to roughly 2,750 ft/s compared to the standard M16, but this tradeoff was acceptable given its primary use in close-quarters jungle and urban combat.
Is the XM177E2 considered a carbine?
Yes, the XM177E2 is classified as a carbine. Its shorter barrel and compact frame suited special operations and close-quarters combat. It is commonly called the "Colt Commando" and represents a compact variant of the M16 rifle.
What type of ammunition does the XM177 use?
The XM177 fires 5.56×45mm NATO ammunition, fed from detachable box magazines. Variants including the XM177E2 used 30-round magazines, and 40-round magazines were also used with XM177 variants. These magazines are compatible with the broader M16 platform.
Who used the XM177E2?
US Army Special Forces, Navy SEALs, and MACV-SOG recon teams used the XM177E2 during the Vietnam War. Colt manufactured 510 units specifically for SOG. Its compact size suited jungle warfare and clandestine operations. Green Berets also favored it for similar reasons.
What is the difference between xm177 and m4?
The XM177 was a 1960s experimental carbine derived from the M16, featuring a telescoping stock and fixed carrying handle with an 11.5 or 10-inch barrel. The M4, developed later, has a 14.5-inch barrel, removable carry handle, Picatinny rail, and improved reliability, becoming the standard US military carbine.