NFA TRANSFER UPDATE — AUGUST 13, 2026: Due to the lack of clear regulatory guidance regarding NFA items, and following the advice of our legal counsel, Idaho Arms & Ammo is continuing to process NFA transfers under our current procedures, including Form 4 submissions for suppressors, SBRs, and other applicable items. We will update this notice as official guidance becomes available. Thank you for your patience and continued support.
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Geissele Super Duty Mod 1 16″
$2,125.00
Out of stock
The Super Duty® MOD1 is the current evolution of the Super Duty® platform, incorporating continuous design development to provide superior ergonomics and modularity while maintaining the legendary balance of performance and reliability.
Both the Geissele CHF barrel and Forged Stressproof Bolt® are High-Pressure Tested (HPT) and Magnetic Particle Inspected (MPI), and work in concert to achieve unmatched dependability with match-grade accuracy. The Forged Stressproof Bolt® is made from Carpenter 158+, directly developed with Carpenter Steel metallurgists to create a material that is cleaner and has less impurities. This makes the Stressproof Bolt® stronger and more fatigue resistant, capable of 5 times the life of a mil-spec bolt.
The Super Duty features a precisely balanced gas system, including the bomb-proofed Super Compact Gas Block, fine-tuned gas port sizing and Super 42® braided buffer spring. These purposefully selected components minimize felt recoil while maintaining reliable cycling, even in adverse conditions. The MOD1 features the HUXWRX Flash Hider-QD muzzle device, offering seamless compatibility with the innovative HUXWRX FLOW series.
At your fingertip is the SSA-E X® two-stage trigger, which provides unrivaled control and performance with a wide-body Lightning Bow® shape and Nanoweapon®-coated components. Purpose-driven controls, like the ambidextrous Super Configurable Safety and Airborne Charging Handle, checkered magazine release and Maritime Bolt Catch provide superior interfacing with the platform.
Rounding out the MOD1, the well-vetted center-tab mated MK16 rail and B5 SOPMOD stock uphold the exceptional ergonomics the Super Duty is known for. The MOD1 enhances handling with the modernized A17 grip, and improves on modularity with the incorporation of the Geissele Quick Disconnect (QD) Sling Mount Endplate and stainless steel QD inserts on the MK16 rail.
Manufactured with confidence and without compromise, the Super Duty MOD1 adds value to the platform while continuing the reputation for excellence.
| LENGTH COLLAPSED: | 33 3/4″ |
| LENGTH EXTENDED: | 36 7/8″ |
| WEIGHT: | Approx. 7 lbs |
| CALIBER: | 5.56MM |
| COLOR: | Black |
| LOWER RECEIVER: | Super Duty Lower Mil-Spec |
| UPPER RECEIVER: | Super Duty M4 Upper |
| BOLT CARRIER GROUP: | Reliability Enhanced Bolt Carrier Group |
| BOLT: | Geissele Stressproof Bolt® |
| RAIL | 15″ MK16 w/ Geissele Center Tab |
| BARREL: | 16″ Barrel, Cold Hammer Forged, Chrome Lined, Geissele Tapered Profile, 1-7 Twist |
| GAS LENGTH: | Geissele Length |
| GAS BLOCK: | Super Compact Gas Block |
| GAS PORT SIZE: | .075″ |
| CHARGING HANDLE: | Airborne Charging Handle (ACH®) |
| MUZZLE DEVICE: | HUXWRX Flash Hider- QD 556 |
| MUZZLE THREAD: | 1/2 x 28 |
| TRIGGER: |
SSA-E X® w/ Lightning Bow® |
| SAFETY: | Super Configurable Safety Selector |
| LOWER PARTS KIT: | Ultra Duty® Lower Parts Kit |
| BUFFER ASSEMBLY: | Super 42® w/ H2 Buffer |
| BUFFER TUBE: |
Mil-Spec 6 Position, 7075-T6 w/ Geissele QD Endplate |
| STOCK: | B5 Systems Enhanced Sopmod Stock |
| GRIP: | Geissele A17 |