Brand: Geissele
Model/Series: MOD1
Caliber: 5.56x45mm NATO
Gas System Length: Mid-Length
Barrel Length: 14.5"
Barrel Description: Geissele Barrel, CHF, Chrome Lined, Heavy, Pin & Weld
Twist Rate: 1:7
Receiver Style: Complete
Bolt: Geissele Stressproof Bolt with Asymmetric Cam Pin
Rail: SMR MK16
Gas Block: Super Compact Gas Block
Charging Handle: Airborne Charging Handle
Muzzle: HUXWRX Flash Hider-QD 556

Features

The Super Duty MOD1 Heavy Barrel (HBAR), takes the Super Duty platform to the next level, with a heavy profile barrel that can handle sustained rates of fire while maintaining the accuracy and reliability the Super Duty is known for.

Foundational to the renowned quality and performance of this Super Duty system is the in-house produced Cold Hammer Forged, chrome-lined Heavy barrel and Nanoweapon-coated Reliability Enhanced Bolt Carrier Group. 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 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 purposefully selected components minimize felt recoil while maintaining reliable cycling, even in adverse conditions. The MOD1 features the signature Nanocoated HUXWRX Flash Hider-QD muzzle device, offering seamless compatibility with the innovative HUXWRX FLOW series.

Rounding out the MOD1 complete upper receiver group, the well-vetted center-tab mated MK16 rail features 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.

Manufactured with confidence and without compromise, the Super Duty MOD1 HBAR adds value to the platform while continuing the reputation for excellence.

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.