Description
AR57 Ultra Light Tactical Upper Assembly 5.7x28mm; 16″ Barrel – 1:9 Twist Rate – Black Melonite Finish; Forged from 1 7075 T6 Monobloc Aluminum; 8620 Steel Alloy Bolt Carrier Buffer Tube & Flashider – Black Meonite Treatment Finish
- Caliber : 5.7x28mm
- Barrel Length : 16″
- Muzzle Threads : 1/2×28
- Receiver : Single-piece 7075-T6 aluminum monobloc
- Magazine Compatibility : FN P90-pattern magazines; includes one 50-round magazine
- Fitment : Drop-in fit to standard AR-15 lower receivers, no modification required
