The BCA AR-15 Complete Upper Assembly has a 16″ spiral fluted heavy barrel made out of 4150 Chrome Moly Vanadium with a parkerized finish, a 1:8 twist rate and a carbine length gas system. The assembly includes a 15″ light wight keymod, an M4 flat top forged upper receiver with forwards assist, bolt carrier group, charging handle and flash hider. It is chambered in .300 Blackout and machined with .300 blackout 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.
