CMMG Resolute 300 Upper 5.7 X 28 16 Barrel with 40-Round Magazine

Resolute 300 Upper Features CMMG IS A LEADING MANUFACTURER OF AR-15 RIFLES 22LR AR-15 CONVERSION KITS AND ACCESSORIES. Resolute 300 Upper Specifications Precise Manufacturing Long Term Reliability Durable Construction High Capacity 40 round capacity magazines 16 inch barrel 5.7X28mm