Quick view Geissele Automatics Geissele Automatics Super Duty, Geissele 08-396b Super Duty Mod1 556 14.5" Blk $2,035.00 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... Compare Add to Cart