BUSHMASTER Patrolman AR-15 M4 A3 .223 Rem/5.56 NATO 16in Black Complete Upper Receiver (91822)

20" Fluted, heavy, non-chrome-lined barrel with 1 in 8" twist11 degree competition muzzle crown and milled gas blockVented free-floating handguard and scope risers on a flat-top upperBolt carrier...

5.56 NATO / .223 Remington Caliber16in. M4 profile barrelChrome-lined bore and chamberCarbine length aluminum free float handguardMilled low profile gas blockBolt carrier assembly

16" barrel is chrome-lined in both bore and chamberMagpul MOE Hand Guard, accepts rail sections (carbine, mid-length or rifle length)Magpul MBUS rear flip sightMagpul MOE pistol grip, accepts MIAD...

Aluminum forearm free-floats the barrel for optimum accuracyHeavy barrel is hard-chrome lined in bore and chamber for exceptional durability and has 1 in 24" twist rifling, optimized for the .450...

Machined from forged 7075 AluminumMil Spec Hard AnodizingForward assist eliminated for weight saving and reduced snag risk1.7 oz lighter than a mil spec upper receiver with hardware installedCaptured...