The BCA AR-15 Complete Upper Assembly has a 24″ spiral fluted, non-threaded, heavy barrel made of 4150 chrome moly vanadium steel with a parkerized finish, rifle length gas system and a 1:8 twist. The assembly includes a 12″ lightweight keymod rail, an m4 flat top forged upper receiver, a bolt carrier group, and a charging handle.. It is chambered in .223 Wylde and machined with M4 feed ramps in the barrel extension.
The BCA upper assembly, like all BCA products, is subjected to numerous QA/QC checks which for our firearms and upper receiver assemblies includes test firing prior to approval and shipment. This upper assembly is also backed by our BCA limited lifetime warranty. Choose an upper assembly designed by a U.S. company and made in the U.S.A. Choose BCA.
BCA DOES NOT recommend using steel cased ammo in our Assemblies or Rifles.
|Material||4150 Chrome Moly Vanadium|
|Gas Block System||0.875|
|Gas Hole Diameter||0.093|
|Charging Style||Rear Charging|