5.56×45 mm Caliber 16 inch Barrel with a 1:8 twist Polymer Carbon Fiber Infused Buffer Tube Polymer Carbon Fiber Infused Lower Reciever Polymer Upper with Metal Inserts Nano SAF-T-FIRST Trigger 15 inch M-LOK Rail 30rd Mag Flip-up Sights ATI SR-1 Stock 6.0 Lbs
ET Arms Inc ETAGOMGA556ML15 Omega-155.56x45mm NATO 30+1 16″, Polymer Rec, No Sights, ATI SR-1 Deluxe Stock, A2 Grip, Nano Composite Saf-T-First Trigger
