Product details

This Bear Creek Arsenal AR-15 Complete Upper has a 10.5” barrel with a Heavy profile, made of 4150 steel with a Parkerized finish, and features a 1:24 Twist Rate, a Carbine length gas system and .750 Gas Block. The Upper Assembly includes a 10” MLOK Rail, an M4 flat-top forged upper receiver with forward assist, a BCA Bolt Carrier Group, an LS2 Flash Hider, and a Charging Handle, It is chambered in .450 Bushmaster and machined with a single feed ramp in the barrel extension.

  • 10.5” Heavy Barrel.
  • 4150 Chrome Moly Vanadium
  • Parkerized finish
  • 1:24 Twist
  • 10” BLANK Rail
  • .450 Bushmaser Caliber
  • Carbine Length Gas System
  • M4 Flat-Top Forged Upper Receiver
  • Standard Bear Creek Arsenal Bolt Carrier Group
  • Charging Handle
  • LS2 Flash Hide
This BCA AR-15 Complete Upper Assembly, like all BCA products, is subjected to numerous QA/QC checks which for BCA's firearms and complete upper receiver assemblies includes test firing prior to approval and shipment. This upper is also backed by BCA's Bear Den Guarantee.


It is the customer's responsibility to be aware of all applicable laws and regulations regarding the purchase and ownership of uppers with a barrel length of less than 16". Federal NFA regulations are applicable to this item. An “AR-15 Pistol” upper assembly has a barrel less than 16” in length. Pistol uppers are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law.

Specifications

More Information
Caliber 450 Bushmaster
Condition New
Caliber 450 Bushmaster
Barrel Length 10.5"
Twist 1:24

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