About This Assembled Upper: This BCA AR-15 is complete.450 Bushmaster rifle length upper has a 16" heavy barrel with a parkerized finish, and features a 1:24 twist rate, with a carbine length gas system. It includes a 15 1/4" MLOK rail, an M4 flat-top forged upper receiver, a BCA bolt carrier group, and a rear charging handle. This.450 Bushmaster upper is compatible with any mil-spec AR-15 lower. This has the new handguard.
Upper: This.450 Bushmaster Upper has a 16-inch heavy barrel that has a 1:24 twist rate and operates on a carbine gas system. The 15-inch M-LOK handguard is made of high-strength material with a deep black finish that makes it corrosion resistant. This upper includes a BCG and charging handle as well as a spiral muzzle device.
Barrel: This Upper Features A 16" Parkerized .450 Bushmaster Heavy Barrel. This Barrel Incorporates a Carbine Gas System for Reliable Operation with a wide variety of Lower Configurations and is threaded for 5/8x32 Muzzle Devices.
Muzzle Device: Including A 5/8x32 Phosphate Spiral Cut Muzzle. On Such a Short Package, the Spiral Cut Flash Hider is Great at Reducing the Signature of Such a Hot Cartridge.
BCG: This Upper Also Includes A Whitelabel .450 Bushmaster Nitride Bolt Carrier Group.
Charging Handle: Also Including A Standard A2 Style Charging Handle.
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