AR-15 5.56/.223 20" Stainless Steel Straight Fluted Upper Assembly, M-LOK

20" 5.56 Upper: Specs & Features

AR-15 5.56/.223 20" stainless steel straight fluted tactical upper assembly. We now make these uppers with 15" Moriarti Mlok Free Float.

Barrel - 20" 416 stainless steel hbar contour barrel. Hardened to 26-32 rc and stress relieved. Chambered in 5.56/.223 Wylde 1-8 rh twist. Button rifled. .750 under gas block. Straight fluted. Barrel is 1/2-28 threaded, completed with triport muzzle brake and crush washer. M4 feedramps.

Handguards - 15" free floating Mlok rail. Made from aircraft quality aluminum and black hardcoat anodized. 

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 - low profile steel .750 gas block, black hardcoat anodized. Rifle length gas tube.

Note: Upper does not come with BCG/CH.  Images may not be an exact representation of the product.

FAQ

Will this upper fit my AR-15 lower?

Yes. It fits any standard mil-spec AR-15 lower receiver and uses a standard 5.56 bolt carrier group and STANAG/AR-15 magazines.

What is a .223 Wylde chamber?

A hybrid chamber that safely fires both 5.56 NATO and .223 Remington while giving the tighter accuracy of a .223-style throat.

Is a bolt carrier group included?

No. The bolt carrier group is sold separately; any standard 5.56 AR-15 BCG will work.

What twist rate does it use?

A 1:8 twist, a versatile rate for 55 gr to 77 gr bullets.

Related: 5.56 NATO & .223 Wylde AR-15 uppers