Geissele Super Duty MOD 1 SBR 5.56 NATO 11.5" Barrel - DDC

Geissele Super Duty MOD 1 SBR 5.56 NATO 11.5" Barrel - DDC

The Super Duty® MOD1 SBR represents the latest refinement of Geissele’s flagship fighting rifle—engineered for shooters who demand uncompromising reliability, superior ergonomics, and modern modularity. Every component is purpose‑built, continuously improved, and battle‑proven, resulting in a platform that balances precision, durability, and control at the highest level.

At the heart of the MOD1 is the legendary Geissele cold hammer forged barrel paired with the Forged Stressproof Bolt®—both HPT/MPI tested and designed to deliver match‑grade accuracy with extreme service life. The Stressproof Bolt®, made from Carpenter 158+ steel, offers dramatically increased strength and fatigue resistance, lasting up to five times longer than a standard mil‑spec bolt.

A meticulously tuned gas system, Super Compact Gas Block, optimized port sizing, and the Super 42® braided buffer spring work together to reduce recoil and ensure consistent cycling in all conditions. The addition of the HUXWRX Flash Hider‑QD muzzle device brings seamless compatibility with the FLOW suppressor series.

Controls are equally refined: the SSA‑E X® two‑stage trigger with Lightning Bow®, Nanoweapon®‑coated internals, ambidextrous safety, Airborne Charging Handle, Maritime Bolt Catch, and checkered magazine release all elevate handling and responsiveness. The MK16 rail with stainless steel QD inserts, B5 SOPMOD stock, and A17 grip round out a rifle built for confident manipulation and mission‑ready performance.

Cold Hammer Forged Barrel
Geissele’s CHF, chrome‑lined, tapered‑profile barrel delivers exceptional accuracy and long‑term durability.

Forged Stressproof Bolt®
Carpenter 158+ steel provides extreme strength and fatigue resistance, lasting up to 5× longer than mil‑spec bolts.

Optimized Gas System
Super Compact Gas Block, tuned port sizing, and Super 42® braided spring minimize recoil while maintaining flawless reliability.

HUXWRX Flash Hider‑QD
Suppressor‑ready muzzle device compatible with the FLOW series for seamless integration.

SSA‑E X® Trigger
Premium two‑stage trigger with Lightning Bow® and Nanoweapon®‑coated components for crisp, consistent performance.

Enhanced Ergonomics
A17 grip, B5 SOPMOD stock, and MK16 rail with stainless steel QD inserts improve handling and modularity.

Ambidextrous Controls
Super Configurable Safety, Airborne Charging Handle, and Maritime Bolt Catch support intuitive manipulation.

Nanoweapon® Coating
Ultra‑hard, corrosion‑resistant coating that rejects carbon and reduces maintenance.

Specifications

• Caliber: 5.56MM
• Color: DDC (Desert Dirt Color)
• Weight: Approx. 6.45 lbs
• Length (Collapsed): 29″
• Length (Extended): 32.25″
• Lower Receiver: Super Duty Mil‑Spec
• Upper Receiver: Super Duty M4
• Bolt Carrier Group: Reliability Enhanced BCG
• Bolt: Geissele Stressproof Bolt® (Carpenter 158+)
• Rail: 10.5″ MK16 with Geissele Center Tab and stainless steel QD inserts
• Barrel: 11.5″ CHF, chrome‑lined, tapered profile, 1:7 twist
• Gas System: Carbine length
• Gas Block: Super Compact Gas Block
• Gas Port Size: 0.067″
• Charging Handle: Airborne Charging Handle (ACH®)
• Muzzle Device: HUXWRX Flash Hider‑QD 556
• Muzzle Thread: 1/2×28
• Trigger: SSA‑E X® with Lightning Bow®
• Safety: Super Configurable Safety Selector
• Lower Parts Kit: Ultra Duty® LPK
• Buffer Assembly: Super 42® with H3 buffer
• Buffer Tube: 7075‑T6 Mil‑Spec, 6‑position, with Geissele QD endplate
• Stock: B5 Systems Enhanced SOPMOD
• Grip: Geissele A17