BCA AR-15 Complete Pistol Upper Assembly, 10.5" 4150 Parkerized Heavy Barrel, .300 Blackout, Pistol Length Gas System, 1:8 Twist w/ 10" MLOK

SKU# 2948 | by Bear Creek Arsenal
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The BCA AR-15 Complete Pistol Upper Assembly has a 10.5" heavy barrel made of 4150 chrome moly vanadium steel with a parkerized finish, a 1:8 twist rate and a pistol length gas system. The assembly includes a 10" mlok rail, an m4 flat top forged upper receiver, a BCA bolt carrier group, bird cage flash hider and a charging handle. It is chambered in .300 blackout and machined with .300 blackout feed ramps in the barrel extension.

The BCA AR-15 Complete Pistol 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.


  • SKU: UA300PHB10.518(P)-(10)MLOK
  • Weight: 4
  • Length: 10.5
  • Profile: Heavy Barrel
  • Twist: 1:8
  • Finish: Parkerized
  • Material: 4150 Chrome Moly Vanadium
  • Thread Pitch: 5/8 x 24
  • Caliber: .300 Blackout
  • Feed Ramp: .300 Blackout
  • Flutes: N/A
  • Gas System: Pistol
  • Gas Block System: 0.750
  • Gas Hole Diameter: 0.125
  • Charging Style: Rear Charging
  • Color: Black
  • Dimpled: No
  • Product Type: No
  • Platform: AR-15

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