The Super Duty Rifle features the latest in weapon technology available exclusively from Geissele Automatics. This 18" rifle chambered in 5.56mm features a Nanoweapon coated Surefire Closed-Tine Warcomp mounted to an in-house 18" Mag Phosphated Cold Hammer Forge, Chrome Lined, 1-7 twist Geissele barrel. Our barrels are precision machined and cold hammer forged utilizing the highest quality materials at our state of the art facility in North Wales, PA. The Super Mid-length gas system and Geissele Super Compact Gas Block (with bomb-proof installation) ensures reliability and optimal performance in extreme conditions and heavy use. Exclusive to the Super Duty 18" Rifle Mfg: Geissele Automatics