AR-15 300 AAC blackout 10.5" classic keymod upper assembly is a perfect addition to your AR pistol. No other modifications to your AR-15 is required. Uses standard AR-15 BCG. All you need is 300 BLK ammo and this upper - and you have a new AR. The 10.5" 300 BLK upper includes:
Barrel - 10.5" heavy contour barrel 4150 black nitride finish. Hardened to 26-32 rc and stress relieved, pistol gas system. Chambered in 300 aac blackout. 1-8 rh twist button rifled. .750 under gas block. Barrel is finished off with A2 flash hider and crush washer. M4 feedramps.
A3 flat top upper receiver - made from certified 7075-t6 aluminum forgings. Black hardcoat anodized to gov. specs. Forward assist and dust cover installed. M4 feedramps.
Gas system - .750 low pro gas block made from aircraft quality aluminum and black hardcoat anodized. Pistol length gas tube.
Handguards - MA free floating carbine length keymod rail, slim design. Made from aircraft quality aluminum and black hardcoat anodized.
Does not come with BCG and Charging Handle. Keymods may differ in look depending on stock availability, the same excellent quality.