M4 Complete Upper, 16", .223 Wylde, Black Rain, 1:8" Twist, Carbine Quad Rail, Nor-Guard Bolt Carrier.

Black Rain
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Direct-impingement upper comes complete with a nickel boron Nor-Guard coated bolt and carrier, and a standard charging handle with extended tactical latch. Barrel is a salt-bath nitride finish, M4 government profile, 416 stainless, 1:8" twist rate, .223 Wylde chambered unit with M4 feed ramps. Includes a low profile gas block and carbine length gas tube, continuous upper rail forend, serrated flash hider, machined billet aluminum receiver with brass deflector, forward assist, and "Let it Rain" dust cover.