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80% Arms sells AR-15 and .308 80% Lower Receivers, 80% Lower Jigs and other accessories which allow you to legally build a firearm at home in most states.
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We utilize state of the art 5-axis CNC machines to mill all our .308 and AR-15 80 percent lower receivers to incredibly precise tolerances using premium billet aluminum.
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We also offer our patented AR-15 and .308 Easy JigsĀ® which is the first 80% lower jig that makes it ridiculously easy for a non-machinist to finish their 80% lower in under 1 hour with no drill press required.
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Products manufactured by 80% Arms carry a lifetime warranty against manufacturing defects. We will promptly replace or repair any product that we determine to be defective.

GST-9 Pistol Frame V1

$129.99
$99.99
GST9 Color Option
Full Size Grip Color Option
SKU:
36019
Shipping:
Calculated at Checkout

SOLD OUT

 

We received permission from the Federal Court to sell this item. State Restrictions apply. READ MORE.

In case you weren't able to get your hands on the first version of the GST-9 frame, now's your chance! The Legacy Frame is back up for grabs! This is the original GST-9 frame, and it includes BOTH compact and large grip modules.

Please Note:

*V1 GST-9 Jigs are also different from MOD1 Jigs due to some slight differences in the frame and the updated rails. V1 GST-9 Jigs must be added to your cart separately but can still be purchased together with the V1 Build Kit in the same order. 

 Find out all the ways you can build out your next GST-9! 

Shipping Restrictions:

This item is restricted from shipping to California, Connecticut, New Jersey, New York, Washington D.C, Washington, Hawaii, Colorado, City of Philadelphia Pennsylvania, Maryland, Illinois, Oregon, and Rhode Island

 Under California law, this product is or contains an unserialized “firearm precursor part” and cannot be sold into the State of California. 80% Arms cannot accept any orders of this product for shipment to the State of California, or to any customer who is a resident of the State of California.

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What makes the GST-9 so special?
  • Modular frame gives you a 19, 19X, 19L, & 17 size weapon system in a single 4-in-1 platform
  • Compatible with Glock 3rd generation parts, holsters, & aftermarket accessories. GST-9 is the first and only 80% lower that is compatible with Glock holsters
  • Ergonomic features include a single undercut, high beavertail, glove bevel, scalloped mag release, no finger grooves, & gas pedals as standard
  • Premium internal rail components extended 3X, made of stainless steel, & Nickel-Boron coated
  • Easily ships to your door & completes in minutes
The GST-9 is the world’s first truly modular polymer 80% pistol frame system compatible with Glock® 19 Gen 1-3 platform components. Patent-pending modular grips allow for easy conversion between compact and full-size frames. Ergonomics have been improved by designing a contoured grip that improves comfort and allows you superior control. An undercut trigger guard gives you a higher grip on the frame, lowering the bore-axis and reducing muzzle flip for faster, more accurate follow-up shots. A compact grip module is included with each frame, with full-size and competition modules also available! 
The GST-9 features several functional improvements over the time-tested Glock® platform, starting with the mating surface between the slide and frame. Frame rails have been extended three times their normal length for more repeatability, better accuracy, and controlled recoil impulse. Nickel-Boron plating improves reliability by reducing friction between moving parts in the harshest conditions, even after liquid lubricants have long since cooked off.
Not only is the GST-9 the most effective 80% pistol yet, it's also the easiest polymer eighty percent pistol to build. We drew upon our expertise as the world leader in jig design to solve the shortcomings of other jigs on the market. Using a five-point clamping mechanism, significantly beefed up drill guides, and a body made of US glass-filled polymer, it's the easiest and most precise pistol jig ever. 
The GST-9 Frame includes the modules, in the same color as the frame. No substitutions are possible.

Due to recently changed ATF regulations, we cannot legally include the jig or frame rails with the GST-9 frame. The jig and GST-9 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 frame you plan to build. Frame rails are ONLY included with the jig, not with the 80% lower itself.

As always, every product is backed by our Lifetime Warranty, and our premium customer support. 

How easy is it to build? Check out the instruction manual and see for yourself! 

*The GST-9 does NOT accept Glock 17 slides. The GST-9 frame accepts Glock 19 & Glock 19L slides* 

 

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