Product details

The Bear Creek Arsenal Complete Upper Assembly has a 16" m4 contour barrel made out of 4150 chrome moly vanadium steel with 1:7 twist rate and a  mid-length gas system. The assembly includes a 15" M-LOK rail, an m4 flat top forged upper receiver with forward assist, a BCA bolt carrier group, birdcage flash hider and charging handle. It is chambered in 5.56 NATO and machined with M4 feed ramps in barrel extension.

  • 16" M4 Contour Barrel
  • 4150 Chrome Moly Vanadium
  • Parkerized Finish
  • 1:7 Twist
  • 15" MLOK
  • 5.56 NATO Caliber
  • M4 Flat Top Upper Receiver
  • Mid Length Gas System,
  • BCA Standard BCG
  • Charging Handle
  • Bird Cage Flash Hider
The BCA upper assembly, like all BCA products, is subjected to numerous QA/QC checks which for BCA's firearms and upper receiver assemblies includes test firing prior to approval and shipment. This upper assembly is also backed by the BCA limited lifetime warranty


More Information
Caliber 223/5.56
Condition New
Manufacturer Bear Creek Arsenal
Caliber 5.56
Barrel Length 16"
Twist 1:7
Color Black
Rail M-Lok

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