AR-15 5.56/.223 20" black diamond modular bull upper assembly is offered exclusively by Moriarti Armaments. The upper receiver features:
Barrel - 20" 416 stainless steel bull contour barrel with black diamond fluting. Hardened to 26-32 rc and stress releived. Chambered in 5.56 nato (also accepts .223 rounds). 1-9 rh twist 6 groove button rifled, .936 under gas block. Target crowned - not threated. 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 gas system.
Handguards - rifle length free floating slim keymod handguard. Made from aircraft quality aluminum and black hardcoat anodized.*
*This upper maybe purchased with keymod, mlok or quadrail handguard option. Please choose your preference on top of the page. Does not come with BCG or Charing Handle. Maybe purchased separately.
CA and NY compliant.