Start your AR-15 build with a superb complete upper receiver from FN! Each component is carefully crafted to FN's unsurpassed Mil-spec standards. With some of the tightest tolerances anywhere, the precision machined aluminum receiver includes M4 feed ramps. It features a 20" cold hammer forged CrMoV barrel that is High Pressure Tested and Magnetic Particle Inspected with a manganese phosphate finish. Their M16/Auto bolt carrier assembly includes a 158 Carpenter Steel Bolt with a properly staked gas key. FN's 20" Rifle Upper Assembly is everything you need and more! Build your next modern sporting rifle with an FNH 15 Complete Upper Assembly!

Specifications and Features:
FNH 15 20" Rifle Upper Assembly 36427
AR-15 Complete Upper Receiver Assembly
5.56 NATO accepts .223 Remington
20" Cold Hammer Forged CrMoV Barrel
M4 Profile and Chrome Lined with a 1:7 RH Twist
Manganese Phosphate Finish, HP and MPI Tested
Rifle Length Gas System
A2 Front Sight Post Gas Block
Aluminum Flattop Upper Receiver
M4 Feed Ramps
Two Piece Single Heat Shield Oval Handguard
M16 Bolt Carrier Group with Staked Gas Key
158 Carpenter Steel Bolt
Black Finish