This BCA AR-15 Complete Upper has a 16″ M4 Contour barrel with a Parkerized finish, and features a 1:8 Twist Rate, a Carbine length gas system. It includes a 15 1/4″ MLOK Rail, an M4 flat-top forged upper receiver with forwarding assist, a BCA Bolt Carrier Group, a Flash Hider, and a Charging Handle. It is chambered in 5.56 NATO.
Choose an upper designed by a US company and made in the USA. Choose Bear Creek Arsenal.
|Material||4150 Chrome Moly Vanadium|
|Thread Pitch||1/2 x 28|
|Gas Block System||0.750|
|Gas Hole Diameter||0.070|
|Charging Style||Rear Charging|
|Classification||Complete Upper Assembly|