ll feature 16-inch barrels with chrome lined bores, chambers, bolt carriers, and gas keys. The chamber specification is 5.56mm NATO dimension or 223 Remington, and the rifling twist is 1:9. The flash suppressor is the A2 military style. The upper and lower receivers are fabricated from 7075 T6 aluminum, manufactured in the U.S. The single stage trigger is factory set for a maximum break weight of seven pounds. Removable carry handle. Includes 1 30rd Magpul magazine.