Geissele GDP Pistol

5.56 NATO · 8" CHF Chrome-Lined Barrel · HUXWRX FH QD · SSA-X Trigger · Phased Array Gas · GDP Brace · Black The Geissele GDP is a 5.56 NATO pistol featuring 8" cold hammer forged chrome-lined barrel with tapered profile, patented Geissele Phased Array gas system, and dual-telescoping GDP brace. HUXWRX Flash Hider QD 5.56 for easy mounting of HUXWRX Flow series suppressors. Tri-Port system works in concert with monolithic bolt carrier buffer system and custom-length Super 42 braided buffer spring. Stressproof Bolt from Carpenter 158+ developed directly with Carpenter Steel metallurgists—cleaner, fewer impurities, stronger, and more fatigue resistant than mil-spec bolt, rated for 5 times mil-spec service life. GDP brace dual-telescoping design opens by pulling to rear from stowed position immediately. Two solid-lock deployment positions. Requires deliberate use of trigger and detent mechanisms to collapse. Velcro strap for one-handed support attaches with two ITW C.L.A.S.H. Hooks. Full access to all firing controls when fully collapsed. Controls and components from the Super Duty line: SSA-X trigger, MK16 rail, Airborne Charging Handle, Super Configurable Safety, Maritime Bolt Catch, Anti-Strike Super Compact Gas Block, A17 grip. Black. Magazine not included.

8" Cold Hammer Forged Chrome-Lined Barrel

8" cold hammer forged barrel with chrome lining and tapered profile. CHF process produces consistent bore dimensions and superior rifling for precision under sustained fire. Chrome lining provides corrosion resistance and extended bore life.

HUXWRX Flash Hider QD

HUXWRX Flash Hider QD 5.56 provides easy mounting of HUXWRX Flow series suppressors. The QD interface allows fast, tool-free suppressor attachment and detachment.

Phased Array Gas System

Patented Geissele Phased Array gas system precisely balanced for 8" barrel length. Works in concert with the Tri-Port system, monolithic bolt carrier buffer system, and custom-length Super 42 braided buffer spring for smooth and controllable recoil impulse.

Stressproof Bolt — Carpenter 158+

Forged Stressproof Bolt made from Carpenter 158+ developed directly with Carpenter Steel metallurgists. The material is cleaner with fewer impurities than standard Carpenter 158—stronger and more fatigue resistant, rated for 5 times the service life of a mil-spec bolt.

Dual-Telescoping GDP Brace

Dual-telescoping GDP brace opens by pulling to rear from stowed position—deploys immediately without deliberate manipulation. Two solid-lock deployment positions. Requires deliberate use of trigger and detent mechanisms to collapse. Velcro strap for one-handed support attaches with two ITW C.L.A.S.H. Hooks. Full access to all firing controls when fully collapsed.

SSA-X Trigger

Geissele Super Semi-Automatic X (SSA-X) trigger provides a two-stage pull optimized for fast, accurate shooting. The SSA-X is the evolution of the proven SSA trigger from the Super Duty line.

MK16 Rail

MK16 M-LOK rail provides accessory mounting across all surfaces. The rail maintains handguard rigidity while accommodating lights, lasers, grips, and other accessories.

Airborne Charging Handle

Geissele Airborne Charging Handle provides positive purchase for reliable manipulation under varied conditions. The extended latch design accommodates gloved operation.

Super Configurable Safety

Super Configurable Safety allows adjustment of throw angle. The configurable design accommodates shooter preference for 45° or 90° throw.

Maritime Bolt Catch

Maritime Bolt Catch provides reliable operation in maritime environments. The serrated design allows positive engagement even with wet or gloved hands.

Anti-Strike Super Compact Gas Block

Anti-Strike Super Compact Gas Block prevents bolt carrier key strike on the gas block during cycling. The compact profile maintains clearance under suppressed and unsuppressed firing conditions.

A17 Grip

Ergonomic A17 grip provides comfortable, consistent hand position. The grip geometry supports natural trigger finger placement for the SSA-X trigger.

Super Duty Platform Components

GDP features the proven controls and components of the Super Duty line—SSA-X trigger, MK16 rail, Airborne Charging Handle, Super Configurable Safety, Maritime Bolt Catch, Anti-Strike Super Compact Gas Block, and A17 grip. The Geissele GDP delivers Super Duty-grade performance in compact pistol format—8" CHF barrel with Phased Array gas system, Stressproof bolt, and HUXWRX QD for suppressor-ready 5.56 capability.

Specifications:

• Manufacturer: Geissele Automatics
• Model: GDP Pistol
• Caliber: 5.56 NATO
• Barrel Length: 8 inches
• Barrel Construction: Cold Hammer Forged (CHF)
• Barrel Lining: Chrome-Lined
• Barrel Profile: Tapered
• Muzzle Device: HUXWRX Flash Hider QD 5.56
• Suppressor Compatible: Yes (HUXWRX Flow Series)
• Gas System: Patented Phased Array
• Tri-Port System: Yes
• Buffer System: Monolithic Bolt Carrier Buffer
• Buffer Spring: Custom Length Super 42 Braided
• Bolt: Forged Stressproof (Carpenter 158+)
• Bolt Service Life: 5x Mil-Spec Rating
• Brace: Dual-Telescoping GDP Brace
• Brace Attachment: Velcro Strap + (2) ITW C.L.A.S.H. Hooks
• Brace Lock Positions: 2
• Trigger: SSA-X (Super Semi-Automatic X)
• Rail: MK16 M-LOK
• Charging Handle: Airborne
• Safety: Super Configurable
• Bolt Catch: Maritime
• Gas Block: Anti-Strike Super Compact
• Grip: A17
• Finish: Black
• Magazine: Not Included