--- title: "Geissele Automatics 300 BLK MOD1 Rifle, FDE" description: "FDE 300 BLK rifle with an 8\" CHF chrome-lined barrel, 7\" MK16 rail, SSA-E X trigger, SBA3 brace, and HUXWRX QD 762 flash hider." canonical_url: "https://www.kygunco.com/product/geissele-super-duty-pistol-300-blackout-8-ddc" meta: author: KYGUNCO "og:description": "FDE 300 BLK rifle with an 8\" CHF chrome-lined barrel, 7\" MK16 rail, SSA-E X trigger, SBA3 brace, and HUXWRX QD 762 flash hider." "og:image": "https://cdn.kygunco.com/assets/products/282147/thumbnail.jpg?v=1766421012" "og:image:height": "500" "og:image:width": "500" "og:title": "Geissele Automatics 300 BLK MOD1 Rifle, FDE" --- > 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-08-518S ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/282147/main.jpg?v=1766421012) For illustration purposes only, this image may not be an exact representation of the product. # GEISSELE Super Duty MOD1 300 Blackout 8" w/out Magazine - FDE The Geissele Super Duty MOD1 is a new FDE 300 BLK rifle with an 8" cold hammer forged, chrome-lined barrel, 7" MK16 rail, SSA-E X two-stage trigger, SBA3 brace, and HUXWRX QD 762 flash hider. It is supplied without a magazine. See Price In Cart ** 5 interest-free payments of **$414.20** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** ![Credova logo](https://www.kygunco.com/brands/credova.svg) As low as **$195.83**/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 # 282147 Style GSS-08-518S UPC 810081135221 Condition New Manufacturer [Geissele Automatics](https://www.kygunco.com/brand/geissele) Model Super Duty Caliber 300 AAC Blackout Action Semi-Auto Barrel Length 8 in The Super Duty® MOD1 represents the latest evolution of the Super Duty® platform, refined through ongoing design advancements to deliver exceptional ergonomics, modularity, and the renowned balance of performance and reliability. The MOD1 300BLK continues this tradition, showcasing cutting-edge technology available exclusively from Geissele Automatics. At its core is the Geissele Cold Hammer Forged, Chrome-Lined barrel, crafted in North Wales, PA from Chrome Moly Vanadium steel for unmatched durability and precision. Distinguishing the MOD1 300BLK is the patented Phased Array® gas system, featuring the Geissele Tri-Port™ design to optimize gas flow and eliminate the need for adjustable systems. Paired with the Geissele braided buffer spring, this configuration ensures smooth, dependable operation—whether shooting suppressed or unsuppressed, with super or subsonic ammunition. FEATURES - Nanoweapon®-coated Reliability Enhanced Bolt Carrier Group with Forged Carpenter 158+ Stressproof Bolt® - SSA-E X® two-stage trigger with Lightning Bow® - Airborne Charging Handle - Geissele Super Modular Rail MK16 w/ Center Tab - Ultra Duty Lower Parts Kit - Super Configurable Safety Selector - Geissele A17 Grip - Geissele Quick Disconnect (QD) Sling Mount Endplate SPECIFICATIONS - Length Collapsed: 24 in - Length Extended: 26 3/4 in - Weight: 5.4 lbs - Lower Receiver: Super Duty Lower Receiver, 300 BLK - Upper Receiver: Super Duty M4 Upper - Bolt Carrier Group: Reliability Enhanced Bolt Carrier Group - Bolt: Geissele Stressproof Bolt - Rail: 7" MK16 w/ Geissele Center Tab - Barrel: 8" Barrel, CHF, Chrome-Lined, Geissele Tapered Profile, 1-7 Twist, 300 BLK - Gas Length: Custom Pistol Length - Gas Block: Antistrike Super Compact Gas Block - Gas Port: Geissele Phased Array w/ Geissele Tri-Port System - Charging Handle: Airborne Charging Handle (ACH) - Muzzle Device: HUXWRX Flash Hider - QD 762 - Muzzle Thread: 5/8x24 - Trigger: SSA-E X w/ Lightning Bow - Safety: Super COnfigurable Safety Selector - Lower Parts Kit: Ultra Duty Lower Parts Kit - Buffer Assembly: Mil-Spec Braided Buffer Spring w/ H1 Buffer - Buffer Tube: Mil-Spec 6 Position, 7075-T6 w/ Geissele QD Endplate - Brace: SB Tactical SBA3 - Grip: Geissele A17 ** 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-super-duty-pistol-300-blackout-8-ddc#webpage","@type":"WebPage","description":"FDE 300 BLK rifle with an 8\" CHF chrome-lined barrel, 7\" MK16 rail, SSA-E X trigger, SBA3 brace, and HUXWRX QD 762 flash hider.","name":"Geissele Automatics 300 BLK MOD1 Rifle, 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