If you’ve ever been torn between building a compact or a full-size pistol, we just made your decision easy — get both.
The GST-9 MOD100 “2 Guns in 1” Bundle gives you everything you need to run a G19-sized carry gun and convert it to a G17-length setup in minutes. The included Overbite Kit lets you extend the dust cover and front rail to support longer slides — no second frame, no extra paperwork, and no wasted money.
This is the most modular Glock-compatible pistol platform on the market. Period.
Here’s What You’re Getting:
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1x Fully Assembled GST-9 MOD100 Frame (G19-sized grip)
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1x Overbite Kit (for G17, 19L, or 19X configurations) - Requires Gen 3 Glock 17 slide
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Smith Defense Lower Parts Kit — installed by a certified armorer
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Test-fired and backed by our lifetime warranty
Why It Matters:
4-in-1 Modularity
G19, 19X, 19L, or G17 — the MOD100 is built to adapt. This bundle unlocks full-size functionality with the same serialized frame.
No Corners Cut
Premium internal components come pre-installed. That means a billet aluminum trigger shoe, polished trigger bar, extended mag release, slide lock, and slide stop — all tuned for smoother shooting and faster reloads.
Better Ergonomics by Design
Gas pedals, undercut trigger guard, high beavertail, and flared magwell come standard. You’ll feel the difference in every shot.
Duty-Grade Durability
Stainless steel internal rails are 3x longer than OEM for added strength and better slide tracking.
Glock-Compatible and Aftermarket Ready
Runs Glock 19 Gen 3 parts and accepts most holsters, slides, and accessories without issue.
Your Purchase = Fuel for the Fight
Every MOD100 sold helps fund our ongoing legal battle to bring back 80% GST-9 frames. You’re not just buying a firearm — you’re supporting the future of DIY gun building.
Regulatory Note:
This is a serialized, completed frame and must ship to an FFL. Not available in: CA, CO, CT, HI, IL, MD, NJ, NY, Philadelphia (PA), RI, WA, or Washington D.C.
Have questions? Reach us anytime at support@80percentarms.com or (949) 354-2767.
