Geissele 5.56 Super Duty MOD 1 Upper Receiver, .750

The Super Duty MOD1 Heavy Barrel (HBAR) uses a heavy profile barrel that can handle sustained rates of fire while maintaining the accuracy and reliability the Super Duty is known for.

The in-house produced Cold Hammer Forged, chrome-lined Heavy barrel and Nanoweapon-coated Reliability Enhanced Bolt Carrier Group are the foundation of this Super Duty system. Both the Geissele CHF barrel and Forged Stressproof Bolt are High-Pressure Tested (HPT) and Magnetic Particle Inspected (MPI), and work together to deliver dependability with match-grade accuracy. The Super Duty features a precisely balanced gas system, including the bomb-proofed Super Gas Block and fine-tuned gas port sizing, especially when combined with the Geissele Super 42 braided buffer spring (sold separately). These components minimize felt recoil while maintaining reliable cycling, even in adverse conditions. The MOD1 features the signature Nanocoated HUXWRX Flash Hider-QD muzzle device, which is compatible with the HUXWRX FLOW series.

The MOD1 complete upper receiver group also includes the center-tab mated MK16 rail with stainless steel QD inserts to reinforce sling attachment. The Airborne Charging Handle provides ambidextrous use and accessibility while maintaining a lower profile to eliminate snagging on gear.