Geissele Super Duty MOD1 5.56 NATO 14.5" DDC SBR 08-520S takes the standard Super Duty platform and stops short of the legal rifle length, requiring the NFA paperwork but skipping the pin-and-weld workaround other 14.5" configurations use. The barrel is cold hammer forged, chrome-lined, and cut to a 1:7 twist on Geissele's tapered profile, running a mid-length gas system through a Super Compact Gas Block with a .076" gas port. This Geissele Super Duty MOD 1 5.56 NATO 14.5 build channels that gas through a Nanoweapon®-coated Reliability Enhanced Bolt Carrier Group with a forged Stressproof Bolt, holding up to sustained round counts better than standard bolts. The Geissele Super Duty 14.5 platform's SSA-E X® trigger with Lightning Bow® splits the difference between a classic M4 trigger and a flat-bow design, giving a smooth first-stage takeup and a crisp second-stage break. A 13.5" MK16 rail with Geissele's Center Tab mating keeps the front end rigid, and a B5 Systems Enhanced SOPMOD stock rides a mil-spec buffer tube with QD endplate for a solid, adjustable cheek weld. Key Features: 14.5" cold hammer forged, chrome-lined barrel, 1:7 twist Mid-length gas system, .076" gas port, Super Compact Gas Block Nanoweapon®-coated Reliability Enhanced BCG, forged Stressproof Bolt SSA-E X® trigger with Lightning Bow® 13.5" MK16 rail w/ Geissele Center Tab B5 Systems Enhanced SOPMOD stock Airborne Charging Handle (ACH®) Approx. 6.7 lbs, DDC finish This Geissele Super Duty SBR delivers the same engineering as its pinned-and-welded siblings in a true short-barrel configuration, chambered in 5.56 NATO for shooters ready to make the NFA transfer. Geissele Automatics Geissele Super Duty MOD 1 5.56 NATO 14.5"Bbl Desert Dirt Color Short Barrel Rifle (NFA) 08-520S