The AR-STONER™ AR-15 A3 Upper Receiver Assembly chambered in 300 AAC Blackout is ready to be assembled to a complete lower and fired! This AR-STONER™ upper features a pistol gas system for use with supersonic or subsonic ammo, a mil-spec bolt carrier group, a 16” mid-profile barrel with a melonite finish and lightweight, 15” free float, AR-STONER™ M-Lok handguard.
Securely mount popular accessories directly to the precision M-Lok cutouts and attach your sling to the integrated QD mounts with this optimum handguard. This sleek and ergonomic free float handguard meets shooters needs without sacrificing strength and performance.
The A3 upper assembly will attach to virtually any standard AR-15 lower receiver and comes complete with charging handle, forward assist, ejection port cover, A2 flash hider, bolt and bolt carrier assembly. Supplied without sights, this upper is a great platform for a red dot sight or iron sights (both sold separately).