AR-15 5.56/.223 16" STAINLESS STEEL PREMIUM QUAD UPPER ASSEMBLY FEATURES:
Barrel: 16" M4 contour, 416r cold rolled steel, stainless steel finish, M4 feedramps, .750 gas block diameter
Gas System: Carbine Length Gas System
Chamber: .223 Wylde (5.56 NATO/.223 REM)
Twist Rate: 1/8 button rifled
Muzzle Device: Thread 1/2 X28 , Birdcage A2
Handguard: Mid-length Qaudrail Free Float - 10"
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. May be purchased separately. For CA and NY compliance, we replace birdcage with a muzzle brake.