Manufactured by Colt for commercial sale, the AR-15 Model 614 automatic rifle was patterned very closely after the early military issued M16 rifle, with the chief difference being in the markings. Post front and two-leaf peep rear sights, with an A1-pattern flash hider on the "5.56" marked HBAR-profile barrel, bayonet lug on the front sight base, ribbed round handguard, and an unmarked upper receiver with short casing deflector and no provision for a forward assist. The lower receiver bears the standard markings on the left side, and is fitted with a Magpul pistol grip and MFT four-position telescoping buttstock. Internally, the unmarked bolt carrier is serrated for a forward assist, with a "MP" marked bolt head. Magazine absent.