AR-15 5.56/.223 20" Bronze Diamond Modular Bull Upper Assembly

20" 5.56 Upper: Specs & Features

AR-15 5.56/.223 20" bronze diamond modular bull upper assembly is offered exclusively by Moriarti Armaments. The upper receiver features:

Barrel - 20" 416 stainless steel bull contour barrel with diamond fluting. Hand bronze coated with stainless flutes. Hardened to 26-32 rc and stress relieved.  Chambered in 5.56 nato (also accepts .223 rounds). 1-8 rh twist 6 groove button rifled, .936 under gas block. Target crowned - not threaded. M4 feedramps.

A3  flat top upper receiver - 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 - low profile gas block made from stainless steel for maximum strength. Rifle length stainless steel gas tube.

Handguards -  rifle-length free floating slim mlok handguard in bronze. Made from aircraft quality aluminum and bronze anodized. 

*Does not come with BCG or Charing Handle. Maybe purchased separately. We may have variations in rail design based on stock availability, the same excellent quality.

CA and NY compliant.

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.

Can I shoot both 5.56 NATO and .223 Remington?

Yes. A 5.56 NATO or .223 Wylde chamber safely fires both 5.56 NATO and .223 Remington ammunition.

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

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