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.
- 10.5" barrel with 1:16 twist
- Heavy contour barrel
- 10" M-Lok rail
- Carbine length gas system
- .346" bore with a .355" groove