Description
The Polymer80 PF45 80% Large Frame Kit is for the builder who wants a serious-duty platform in 10mm or .45 ACP. This kit gives you the foundation for a Glock 20/21 compatible build, letting you finish the frame to your exact specs. We’ve stocked this since early 2024, and it’s one our repeat customers keep coming back for. It’s a solid route to a powerful, custom large-frame pistol.
What Makes It Stand Out
- Large Frame Compatibility: Engineered specifically for the robust Glock 20 (10mm) and Glock 21 (.45 ACP) platforms, handling higher-pressure rounds.
- 80% Design: Provides a legal, unserialized starting point. You complete the critical machining, making it uniquely yours.
- Enhanced Ergonomic Grip: Features a more aggressive texture and an undercut trigger guard for a higher, more controlled grip.
- Durable Polymer Construction: Built with Polymer80’s reinforced polymer for a lightweight yet tough frame that stands up to heavy use.
- Jig & Tooling Included: Comes with the necessary jig and drill bits for a straightforward completion process.
Tech Specs
| Model | PF45 |
| Compatibility | Glock 20 / 21 (Large Frame) |
| Caliber | 10mm Auto / .45 ACP |
| Frame Material | Reinforced Polymer |
| Completion Required | 80% (Jig & Bits Included) |
| Weight (measured) | 2.2 oz |
| Grip Style | Aggressive Texturing, Undercut Trigger Guard |
| Rail System | Standard Picatinny Accessory Rail |
Common Questions
What tools do I need to finish this 80% frame?
You’ll need a hand drill or drill press, a vise, some files or sandpaper, and a hobby knife or razor. The provided jig and drill bits guide the process. It’s a straightforward job for anyone comfortable with basic tools.
Is this compatible with Gen 3 or Gen 4 Glock parts?
The PF45 is designed for Gen 3 Glock 20/21 parts. You’ll need a Gen 3-compatible slide, parts kit (LPK), and magazine. Gen 4 parts are not compatible with this frame.
Any advice for the first range trip?
Our staff’s note: ‘We recommend breaking in with 50 rounds before relying on it for carry.’ Use full-power ammunition, ensure the slide cycles smoothly, and verify function with your chosen magazine. This ensures reliability.
✅ Plain, unmarked packaging
✅ Easy 30-day return policy
✅ 256-bit encrypted checkout
✅ USA-based seller
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