Build the custom rifle you want without shooting holes in your budget. The Anderson Manufacturing 16 .300 Blackout Upper is an optic-ready, forged-build upper receiver featuring a 16 barrel with 1:7 rate-of-twist rifling and .308 A2 flash hider. A2 carbine hand guard. .750 standard-carbine gas block. Bolt carrier group and charging handle not included. Color: Blackout. Type: AR-15 Uppers.