AR-15 5.56/.223 16" BULL UPPER ASSEMBLY / 15" MLOK RAIL / BLACK. CA and NY compliant. PLEASE NOTE: WE CAN NOW MAKE THE RAIL IN ANODIZED BLACK ONLY. PICTURE SHOWS RAIL IN THE RED (NOT AVAILABLE)

Action: Semi-auto

Barrel: 16" heavy profile, 4150V steel, chrome moly, heat treated, black, M4 feedramps, .750 gas block diameter.

Gas System: Carbine Length Gas System

Chamber: 5.56 (accepts both, 5.56 NATO/.223 REM)

Twist Rate: 1/8 button rifled*

Muzzle Device: target crown

Handguard: 15" Rifle-length Free Float in BLACK

A3 flat top upper receiver - Made from certified 7075-T6 aluminum forgings, black hardcoat anodized to gov. specs.; forward assist (in red) and dust cover installed. Anodized black.

Does not come with BCG and Charging Handle. May be purchased separately.

Barrel twist may fluctuate between 1/7 and 1/8, depending on stock availability.