Gas System: Carbine Length Gas System
Chamber: 5.56 NATO/.223 Wylde
Twist Rate: 1/8 button rifled*
Muzzle Device: Thread 1/2 X28 muzzle brake
Barrel: 16" M4 contour, 4150V steel, chrome moly, heat treated, black, M4 feedramps, .750 gas block diameter
Handguard: Rifle length keymod Free Float
A3 flat top upper receiver - Made from certified 7075-T6 aluminum forgings, black hardcoat anodized to gov. specs.; forward assist and dust cover installed
Does not come with BCG and Charging Handle. Can be purchased separately. Twist of the barrel may vary between 1/8 and 1/9, depending on stock availability.