One Horse Complete AR-15 Upper Receiver - 300 Blackout - 7.5"

Overview

The One Horse Complete AR-15 Upper Receiver in 300 Blackout is built to mil-spec standards in the USA and features a 7.5-inch medium-profile 4150 steel barrel with a nitride finish. The barrel includes a pistol-length gas system and a 5/8x24 threaded muzzle. It is surrounded by a 7-inch M-LOK free-float handguard mounted via a rigid steel barrel nut, which isolates the barrel from contact pressure to maintain consistent harmonics. The upper comes complete with a nitride-treated bolt carrier group and a standard charging handle. Due to the 7.5-inch barrel length, this complete upper receiver is intended for use on an AR pistol or a registered short-barreled rifle.

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