Geissele Super Duty MOD1 5.56 14.5" P&W | Heavy Barrel Rifle

The Geissele Super Duty MOD1 14.5" Heavy Barrel Rifle in 5.56 NATO is a semi-automatic AR-15 platform rifle designed for users seeking a heavier barrel profile for sustained firing applications. This model features a 14.5" cold hammer forged, chrome-lined barrel with a pinned and welded muzzle device, along with a mid-length gas system. The rifle is built around a mil-spec pattern receiver set and includes a free-float MK16 handguard for accessory mounting.

This configuration incorporates a two-stage trigger, ambidextrous charging handle, and configurable safety selector to support user control and customization. Additional components include a coated bolt carrier group, compact gas block, and adjustable stock system. The platform is configured with a tuned gas and buffer system to support consistent cycling with 5.56 NATO ammunition and is offered as a complete rifle.

Specifications

• Caliber: 5.56 NATO
• Barrel length: 14.5" (pinned & welded)
• Barrel profile: Heavy (HBAR)
• Barrel material: Cold hammer forged, chrome-lined
• Twist rate: 1:7
• Gas system: Mid-length
• Gas block: Low-profile compact gas block (.750 journal)
• Receiver set: Mil-spec upper and lower
• Handguard: 13.5" MK16 free-float rail
• 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 H2 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, pinned & welded)
• Overall length: 32" (collapsed) / 35 1/4" (extended)
• Weight: Approx. 7.3 lbs
• Finish: Black