AR-15 300 AAC Blackout 16" stainless steel spiral fluted tactical upper assembly. 300 Blackout chamber uses AR-15/M16 BCG and standard AR-15 mags. The upper features:
Barrel - 16" 416 stainless steel hbar contour barrel with x-treme spiral fluting. Hardened to 26-32 rc and stress releived. Chambered in 300 BLK. 1-7 rh twist 6 groove button rifled. .750 diameter under gas block. Threaded 5/8x24 with stainless steel muzzle brake and a crush washer. M4 feedramps.
A3 flat top upper reciever - made from certified 7075-t6 aluminum forgings. Black hardcoat anodized and teflon coated to gov. specs. Forward assist and dust cover installed. M4 feedramps.
Gas system - .750 low profile gas block made from aircraft quality aluminum and black hardcoat anodized. Carbine length gas system.
Handguards - 12" mid-length free floating quad monolitic rail handguard. Made from aircraft quality aluminum and black hardcoat anodized.
Does not come with BCG and charging handle. Can be purchased separately. Rials may differ in design, based on stock availability, the same excellent quality. You may choose a keymod rail option for your build as well.