The AR-STONER AR-15 Side Charging Upper Receiver Assembly chambered in 5.56x45mm has a 10.5" barrel with an M4 Contour profile, made of 4150 Chrome Vanadium with a matte finish. It features a 1:7 twist rate, and a carbine length gas system. The upper includes a 10" M-LOK Rail, an M4 flat-top forged upper receiver with forwarding assist, a bolt carrier group, a flash hider, and a charging handle. It is chambered in 5.56x45mm NATO.
Attach your favorite sling to the free float handguard with integrated QD mounts and use the precision M-LOK cutouts at the three, six, and nine o'clock positions for mounting MIL-STD 1913 picatinny rails or other direct-attach M-LOK accessories.
- 10.5" barrel with a M4 contour
- 10" M-Lok handguard
- Chambered in 5.56x45mm NATO