GST-9 Mod 1

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Key Features

  • Modular frame gives you the possibility of a 19, 19X, 19L, & 17 size weapon system in a single 4-in-1 platform
  • Compatible with Glock 19 3rd generation parts, holsters, & aftermarket accessories. GST-9 is the first and only 80% lower that is compatible with Glock holsters
  • Ergonomic features include an undercut trigger guard, high beavertail, glove bevel, scalloped mag release, no finger grooves, & newly redesigned gas pedals as standard
  • Premium internal rail components extended 3X, made of stainless steel, with multiple coating options
  • Easily ships to your door & completes in minutes
  • 5
    Top notch product

    Posted by Darin Kuipers on 12.18.22

    Shipping was fast. Customer service by far the best. If they are out of stock on a product you ordered they let you know ASAP and they have a backup plan. Just want to thank Mad cow defense for great product and customer service.

  • 5
    GST-9 Frame

    Posted by Jim Black on 08.31.22

    I've built P80s, 1911s, ARs & Sigs. I'm partial to Sigs but THIS IS by far the easiest product to start with and end up with a piece you'll be proud to say YOU BUILT YOURSELF!