Super Duty MOD1 Rifle 5.56MM Semi-Auto Rifle The Super Duty Mod1 Rifle improves upon the renowned Geissele Super Duty with the addition of a HUXWRX Flash Hider-QD 556 suppressor-ready muzzle device, an updated MK16 Super Modular Rail with press-fit stainless steel Quick Disconnect (QD) inserts, an A17 Grip that presents a more ergonomic grip angle, and a QD Sling Mount Endplate. The SD Mod1 updates several key components that ensure this high-end rifle will continue to offer the user unmatched accuracy, comfort, and performance. Geissele provides the latest in weapon technology available. This rifle chambered in 5.56mm features a nanoweapon-coated HUXWRX Flash Hider-QD muzzle de Mfg: Geissele Automatics