Bushmaster XM15 A2 20" Fixed Carry Handle 5.56Description We brought back phosphate finished, chrome lined barrels and bolt carriers to rival the durability of the Windham, Maine originals. This may have been your fathers rifle growing up, or possibly your first AR. Our legacy began back when trucks didnt need a microchip and your password got you into the treehouse, not locked out of your bank account. Specifications Caliber: 5. 56 NATO . 223 REM Barrel Length: 20 Barrel Material: Phosphate