Grid Defense Complete Upper Receiver 9mm 9x19 Para 5.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail Dimpled Flash Can Blue. Grid Defense machined these AR15 Upper Receivers from 7075-T6 aluminum for a lightweight yet durable...
Grid Defense Complete Upper Receiver 9mm 9x19 Para 5.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail Dimpled Flash Can Blue. Grid Defense machined these AR15 Upper Receivers from 7075-T6 aluminum for a lightweight yet durable...