FN USA FN 15 Military Collector Series M4 Complete Upper Receiver Assembly 5.56mm 16" Barrel
FN USA FN 15 Military Collector Series M4 Complete Upper Receiver Assembly 5.56mm 16" Barrel, Own a piece of firearm history from the makers of the world's most battle-proven firearms. The FN 15A(R) Military Collector Series M4 upper receiver assembly is an authentic reproduction of the original, made to FN's and the U.S. military's exacting specifications. A 14.7-in. chrome-lined barrel is button-broached, with a 1:7 twist rate, the welded compensator brings the barrel length to 16-in. Cut with a 5.56x45mm NATO chamber to mate with the Carpenter 158 steel bolt, each MIL-SPEC bolt carrier is high-pressure and magnetic particle tested for enduring reliability.
CALIBER: 5.56x45mm
WEIGHT: 4.98 Lbs.
BARREL LENGTH: 16"
OPERATION: DIRECT IMPINGEMENT CARBINE-LENGTH GAS SYSTEM
TWIST RATE: 1:7 RH
SIGHTS: A2-style front, adjustable rear sight