Product Code: 38019-FDE-BLEM

GST-9: MOD1, Pistol Frame - Flat Dark Earth - Blemished


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Current Stock:

We’re working around the clock to get your order out. Please refer to our production update blog for the most recent updates here.

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Questions on how ATF rule affects these products? View ATF Rule Directory

We received a batch of FDE MOD-1's with very minor blemishes and we're selling them with both grips included at a great discount!

The GST-9 MOD1 platform is centered around the user as one shooter's needs may be different from another. That's why 80% Arms designed a modular platform that allows you to complete a polymer 80% Glock compatible frame based on your preferences. Whether you need something more compact for concealment or slightly larger for competition, you have the options to build this tool to work for you the way you want. 

NOTE: The MOD1 does NOT accept GLock 17 slides. The frame only accepts Glock 19 and Glock19L slides. Purchase of any MOD1 includes one compact grip module in the same color as the selected frame. No substitutions are possible.


Due to a change in ATF regulations, we cannot legally include the jig or frame rails with the GST-9 MOD1 frame. The jig and frame must be purchased on our website as two separate items. Each jig includes one set of GST-9 frame rails. You will need to purchase one jig for every GST-9 MOD1 frame you plan to build. Frame rails are ONLY included with the jig, not with the 80% pistol frame itself. 


Because the GST-9 MOD1 is not a firearm, in most cases it's currently legal to purchase and own an unfinished frame in California. California law prohibits building an off-roster handgun as well as a home built firearm that does not contain an integral 3.7 oz piece of stainless steel. If you are purchasing a GST-9 MOD1 that ships to California, you certify that you have a law-enforcement exemption or intend to build and maintain the product outside of the state. 


  • Modular | frame gives you a G19, G19X, G19L (similar to G17 length) and G19XL (similar to G34 length) sized weapon system in a single 4 for 1 platform
  • Glock Gen 3 Compatibility | The first and only 80% pistol frame that fits Glock compatible holsters
  • Ergonomics | frame design includes a single undercut, high beavertail, glove bevel, scalloped mag release, no finger grooves, stippled like texture and gas pedals as standard
  • Premium Improvements | internal rail components are extended 3x the OEM length which are made in stainless steel coated in NiB or black nitride.
  • Ships straight to your front door and can be completed in minutes

Shipping Restrictions: This item is restricted from shipping to New Jersey, New York, Hawaii, Connecticut, Rhode Island, Washington D.C., Maryland, Illinois, California, Washington, Allenspark Colorado , Coal Creek Canyon Colorado , Eldora Colorado , Eldorado Springs Colorado , Gold Hill Colorado , Gunbarrel Colorado , Hygiene Colorado , and Niwot Colorado, and Denver Colorado.