BCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized M4 Contour Barrel, .300 Blackout, Carbine Length Gas System, 1:7 Twist w/ 15" M-LOK

The BCA AR-15 Complete Upper Assembly has a 16" m4 contour barrel profile made of 4150 chrome moly vanadium steel with a parkerized finish, a carbine length gas system and a 1:7 twist. The assembly includes a 15" M-LOK rail, an m4 flat top forged upper receiver, a proprietary bolt carrier group, a charging handle and a bird cage flash hider. It is chambered in .300 Black-Out 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. SKU UA300CM41617(P)-(15)M-LOK Weight 4.0000 Length 16 Profile M4 Contour Twist 1:7 Finish Parkerized Material 4150 Chrome Moly Vanadium Thread Pitch 5/8 x 24 Caliber .300 Blackout Feed Ramp M4 Flutes N/A Gas System Carbine Gas Block System 0.750 Gas Hole Diameter 0.085 Charging Style Rear Charging Color No Dimpled No ?