FN USA FN 15 Military Collector Series M16A4 Complete Upper Receiver Assembly 5.56mm 20" Barrel

FN USA FN 15 Military Collector Series M16A4 Complete Upper Receiver Assembly 5.56mm 20" Barrel

Own a piece of firearm history from the makers of the world's most battle-proven firearms. The FN 15® Military Collector Series M16 upper receiver assembly is an authentic reproduction of the original made to FN's and the U.S. military's exacting specifications. A 20-inch 1:7 RH button-broached barrel is chrome-lined and chambered in 5.56x45mm NATO. The upper is furnished with a complete M16-style MIL-SPEC bolt carrier group including a HPT/MPI-tested bolt made from Carpenter 158 steel. A Knight's Armament M5RAS quad-rail and adapter covers finish off the authentic reproduction making a perfect match for any M16-style build.

Specifications:
- Caliber: 5.56x45mm
- Weight: 5.61 Lbs.
- Barrel Length: 20"
- Operation: Direct Impingement Rifle Length Gas System
- Twist Rate: 1:7 Rh
- Sights: A2-Style Front Adjustable Rear Sight