Description
The Polymer80 PF45 80% Frame Kit is the foundation for building a custom large-frame Glock-style pistol chambered in 10mm Auto or .45 ACP. This is the go-to platform for enthusiasts who want the performance of a Glock 20 or 21 with the personalization of a custom build. We’ve stocked this kit since early 2026 because our repeat customers consistently come back for it.
Stand-Out Features
- Dual-Caliber Platform: Engineered to accept Glock 20 (10mm) and Glock 21 (.45 ACP) slides and parts kits, offering maximum versatility from a single frame.
- Enhanced Ergonomic Design: Features a more aggressive, textured grip and an undercut trigger guard for improved control and a higher, more comfortable grip.
- Jig-Included Completion: Comes with the proprietary Polymer80 jig and required drill bits, providing everything needed to finish the frame to a precise, functional standard.
- Reinforced Polymer Construction: Made from a durable, fiberglass-reinforced polymer that maintains a lightweight profile while providing a solid foundation for the build.
- Serialized Rear Rail Module: Includes a metal, serialized rear rail module (where required by law) for a secure and reliable slide-to-frame fit.
Technical Data
| Compatible Models | Glock 20 / 21 |
| Caliber | 10mm Auto, .45 ACP |
| Frame Material | Fiberglass-Reinforced Polymer |
| Frame Finish | Matte Black |
| Weight (measured) | 3.6 oz |
| Includes | 80% Frame, Jig, Drill Bits, Pins |
| Rear Rail | Included, Serialized |
| Grip Style | Aggressive Texturing, Undercut Guard |
Your Questions Answered
What tools do I need to complete this 80% frame?
You will need a hand drill or drill press, a vise to secure the jig, a set of files or a Dremel tool with sanding drums, and a hammer or punch set for installing the pins. The provided jig and drill bits are specifically designed for this frame.
Can I use both 10mm and .45 ACP slides on this one frame?
Yes. The PF45 frame is designed to accept both Glock 20 (10mm) and Glock 21 (.45 ACP) slides, barrels, and recoil spring assemblies. You will need the complete upper parts kit and magazine specific to the caliber you choose to build.
Why is this frame so popular?
It fills a specific niche for a customizable, large-frame polymer pistol. The demand is high because it allows builders to create a robust 10mm or .45 platform that isn’t as commonly available as compact models. Our staff keeps 20+ in stock because backorders are frequent elsewhere.
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