FN 15® M4 Upper Assembly
Military Collector Series - Complete Upper Receiver Assembly
- 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
Knights Armament M4 RAS Adapter rail with rail adapter covers
M16-style MIL-SPEC bolt carrier group and HPT/MPI-tested bolt made from Carpenter 158
Matech Rear Sight
Button-broached, chrome-lined barrel (16” overall length)
A2-style compensator (permanently attached), actual barrel length 14.7”