Geissele Super Duty MOD1-A 5.56 | SBR

The Geissele Super Duty MOD1-A 5.56 SBR is a semi-automatic rifle designed for AR-15 platforms, available in 10.3", 11.5", and 12.5" barrel lengths. Chambered in 5.56 NATO, this short-barrel configuration features a cold hammer forged, chrome-lined barrel and a carbine-length gas system. The rifle includes a free-float MK16 handguard and is compatible with standard AR-pattern accessories, making it suitable for a range of applications including range use and general-purpose shooting.

This model incorporates a fully ambidextrous billet lower receiver with mirrored controls for magazine release and bolt operation. Additional features include a two-stage trigger with a flat-profile bow, coated bolt carrier group, ambidextrous charging handle, and adjustable stock. The system is configured with a tuned gas and buffer setup to support consistent cycling. Available in Black or Desert Dirt Color (DDC), this SBR is offered as a complete rifle platform.

Specifications

• Caliber: 5.56 NATO
• Barrel lengths available: 10.3", 11.5", 12.5"
• Barrel material: Cold hammer forged, chrome-lined
• Twist rate: 1:7
• Gas system: Carbine length
• Gas block: Low-profile compact gas block
• Receiver set: Billet upper and fully ambidextrous lower
• Bolt carrier group: Included, coated for wear resistance
• Bolt: Carpenter 158 steel (enhanced design)
• Charging handle: Ambidextrous (Airborne Charging Handle)
• Trigger: SSA-E X two-stage (Lightning Bow)
• Safety: Configurable safety selector
• Buffer system: Super 42 braided spring with H3 buffer
• Buffer tube: Mil-spec 6-position, 7075-T6 with QD endplate
• Stock: B5 Systems Enhanced SOPMOD
• Grip: A17 pistol grip
• Muzzle device: HUXWRX flash hider (1/2x28 thread)
• Weight: Approx. 6.3 – 6.45 lbs (depending on configuration)
• Finish options: Black or DDC (Desert Dirt Color)