--- title: "Geissele Automatics 5.56 Defense Pistol, 8\" Black" description: "Semi-automatic 5.56 NATO pistol with an 8\" cold hammer forged, chrome-lined barrel, 1:7 twist, black finish, and 7\" MK16 handguard." canonical_url: "https://www.kygunco.com/product/geissele-defense-pistol-5.56-gdp-8-black" meta: author: KYGUNCO "og:description": "Semi-automatic 5.56 NATO pistol with an 8\" cold hammer forged, chrome-lined barrel, 1:7 twist, black finish, and 7\" MK16 handguard." "og:image": "https://cdn.kygunco.com/assets/products/308057/thumbnail.jpg?v=1781018179" "og:image:height": "500" "og:image:width": "500" "og:title": "Geissele Automatics 5.56 Defense Pistol, 8\" Black" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Guns](https://www.kygunco.com/category/shooting/guns) / [Handguns](https://www.kygunco.com/category/shooting/guns/handguns) / [Semi-Auto](https://www.kygunco.com/category/shooting/guns/handguns/semi-auto) / GSS-08-427B ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/308057/main.jpg?v=1781018179) For illustration purposes only, this image may not be an exact representation of the product. # GEISSELE Defense Pistol GDP 5.56 8" - Black The Geissele Defense Pistol is a compact semi-automatic 5.56 NATO platform with an 8" cold hammer forged, chrome-lined barrel, 1:7 twist, 7" MK16 handguard, dual-telescoping GDP brace, SSA X trigger, and black finish. See Price In Cart ** 5 interest-free payments of **$472.80** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** ![Credova logo](https://www.kygunco.com/brands/credova.svg) As low as **$223.54**/month with ![Credova text logo](https://www.kygunco.com/brands/credova-text.svg) ** Online In Store ** Free Shipping Enjoy delivery to the Lower 48 States at no cost. ** Ships To FFL Dealer Handled by our expert shippers in Bardstown, KY. ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Almost gone. Order now before it sells out. Item # 308057 Style GSS-08-427B UPC 810081135597 Condition New Manufacturer [Geissele Automatics](https://www.kygunco.com/brand/geissele) Model Defense Caliber 5.56 NATO Action Semi-Auto Barrel Length 8 in The Geissele Defense Pistol (GDP) delivers compact defensive capability with premium engineering drawn from the Super Duty platform. Designed for confined spaces and rapid deployment, this 5.56 platform combines advanced gas system tuning, durable materials, and proprietary components to provide exceptional reliability and controllability in a highly compact format. FEATURES - Geissele Phased Array® gas system optimized for short-barrel performance - Tri-Port™ system paired with Super 42® braided buffer spring for smooth recoil impulse - Cold hammer forged, chrome-lined tapered barrel for durability and accuracy - Geissele Stressproof Bolt® made from Carpenter 158+ for extended service life - Dual-telescoping GDP pistol brace with rapid deployment and secure lock positions - HUXWRX flash hider compatible with Flow series suppressors - SSA X® wide-body trigger for enhanced control and feel - MK16 handguard with rigid mounting and accessory support - Airborne Charging Handle and Maritime Bolt Catch for enhanced manipulation - Anti-Strike Super Compact gas block for durability and reliability SPECIFICATIONS - Caliber: 5.56 NATO - Barrel Length: 8" - Overall Length: 21 3/4" collapsed, 27 1/4" extended - Weight: approximately 5.5 lbs - Twist Rate: 1:7 - Action: Semi-automatic - Gas System: Pistol length - Muzzle Thread: 1/2x28 - Finish: Black - Upper Receiver: M4A1 - Lower Receiver: GFW mil-spec semi-auto - Handguard Length: 7" - Grip: Geissele A17 reduced angle ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## Don't Forget Your Ammo ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/geissele-defense-pistol-5.56-gdp-8-black#webpage","@type":"WebPage","description":"Semi-automatic 5.56 NATO pistol with an 8\" cold hammer forged, chrome-lined barrel, 1:7 twist, black finish, and 7\" MK16 handguard.","name":"Geissele Automatics 5.56 Defense Pistol, 8\" 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