The AR-STONER AR-15 Side Charging Upper Receiver Assembly Gen 2 is chambered in 300 AAC Blackout and delivers precision accuracy at an affordable price. The machined billet aluminum upper receiver is combined with an extruded aluminum free float M-LOK handguard and both are hard coat anodized.
This complete upper features a carbine-length gas system, bolt carrier group, 16” Heavy profile barrel with a matte finish and a lightweight 15” free float AR-Stoner M-LOK handguard and a flash hider.
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.
- Gen 2 Bolt Handle
- Chambered in 300 AAC Blackout
- 16″ Heavy Contour Barrel
Color Black Finish Anodized Material Aluminum Weight 4.68 Pound Barrel Length 16 Inches Twist 1:8 Inches Threads 5/8″-24 Barrel Contour Heavy Barrel Finish Parkerized Chrome Lined No Gas Block Diameter 0.75 Inches Gas System Length Carbine M4 Feed Ramps Yes Upper Receiver Type Side Charging Gen 2 Barrel Material 4150 Chrome Moly Vanadium Steel Handguard 15″ M-Lok Ultralight Bolt Carrier Assembly Included Yes Muzzle Device Flash Hider Country of Origin United States of America