This AR-STONER AR-15 Upper Receiver provides style, function, affordability to your AR-15. The A3 upper attaches to virtually any standard AR-15 lower receiver. Machined with 300 Blackout feed ramps, this upper features an M-Lok handguard and 4150 Chrome Moly Vanadium barrel with a matte finish to top it off. M-Lok Handguard slots allow mounting of popular M-Lok compatible accessories directly to precision cutouts and features integrated QD sling mounts with a sleek design that does not sacrifice strength or ergonomics. The AR-STONER Carbine Kit also includes a M4 mil-spec 6-position stock assembly. The buffer tube is machined from 6061-T6 aluminum and given a hard coat anodized finish to withstand years of abuse. The 6-position telescoping stock features a built-in sling swivel to mount your favorite rifle sling.Included in the Carbine Kit is the AR-STONER Lower Parts Kit which includes everything needed to build a complete lower receiver, except a stripped lower receiver. All part...