This BCA AR-15 complete .450 Bushmaster rifle length upper has a 18" heavy barrel with a parkerized finish, and features a 1:24 twist rate, with a mid-length gas system. It includes a 15" MLOK rail, an M4 flat-top forged upper receiver, a BCA bolt carrier group, a flash hider, and a rear charging handle. This .450 Bushmaster upper is compatible with any mil-spec AR-15 lower. This has the new handguard.
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Magazine not included. Check out Magazines here!
|Material||4150 Chrome Moly Vanadium|
|Thread Pitch||5/8 x 32|
|Feed Ramp||Single Feedramp|
|Gas System||Mid Length|
|Gas Block System||0.750|
|Charging Style||Rear Charging|
|Classification||Complete Upper Assembly|
What magazine/ammo does BCA recommend for each caliber?
These are brands that BCA uses in the facility to test fire our products. However, there are several brands that will also function properly. Caliber Magazine Ammo Grain Weight Ammo Brands BCA Status AR15 - 223/5...