AR-15 300 AAC Blackout 16" Stainless Black Diamond Fluted Upper

16" Black Diamond 300 BLK Upper: Specs

AR-15 300 AAC blackout 16" stainless steel black diamond fluted upper assembly. 300 blackout caliber uppers use your standard .223/5.56 bolt carrier group and magazines! No special bolts or magazines to buy to get into a new caliber. 

• Barrel - 16" 416 stainless steel hbar contour barrel. Hardened to 26-32 rc and stress relieved. Chambered in 300 blackout. 1-7 rh twist. Button rifled. .750 under gas block. Black diamond fluted. 5/8-24 threads completed with nitride triport muzzle brake 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 profile gas block made from steel and black hardcoat anodized. Carbine length gas system.

• Handguards - 12" mid-length free floating MLOK rail. Made from aircraft quality aluminum and black hardcoat anodized. Mloks may vary in design, depending on stock availability, the same excellent quality.

Upper assembly does not include BCG and Charging Handle. Maybe purchased separately. Current ETA: 4-6 weeks. Images may not be an exact representation of the product. 

FAQ

Can 300 Blackout ammo be mixed up with 5.56?

Keep them separate. A 300 BLK round can chamber in a 5.56 rifle and firing it can destroy the gun, so mark your 300 BLK magazines and uppers clearly.

Is a bolt carrier group included?

No. Add a standard AR-15/5.56 bolt carrier group; it is available as an add-on on this page.

What twist rate does the barrel use?

A 1:7 twist, which stabilizes both heavy subsonic and lighter supersonic 300 Blackout loads.

Related: 300 Blackout AR-15 uppers · 300 Blackout suppressors · 5.56 NATO vs 300 Blackout