AR-STONER AR-15 Pistol A3 Upper Receiver Assembly 350 Legend 10.5″ Barrel with 10″ M-Lok Handguard

MidwayUSA is proud to offer this AR-STONER 10.5″ 350 Legend Upper Receiver Assembly. This AR-STONER upper features a 350 Legend bolt carrier group, parkerized finish, low profile gas block, and heavy barrel contour. The A3 upper will attach to virtually any standard AR-15 lower receiver and comes complete with charging handle, forward assist, ejection port cover, flash hider, bolt and bolt carrier assembly. Supplied without a rear sight, this upper is a great platform for a red dot sight or iron sights. Features: 10.5″ barrel with 1:16 twist Heavy contour barrel 10″ M-Lok rail Carbine length gas system .346″ bore with a .355″ groove