Super Duty MOD1 Pistol The Super Duty Mod1 Pistol 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, and an A17 Grip that presents a more ergonomic grip angle. The SD Mod1 updates several key components that ensure this high-end firearm will continue to offer the user unmatched accuracy, comfort, and performance. Geissele provides the latest in weapon technology available. This pistol chambered in 5.56mm features a nanoweapon-coated HUXWRX Flash Hider-QD muzzle device mounted to an in-house Manganese Phospha Mfg: Geissele Automatics