Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible)

If you are looking to build a large-frame pistol from the ground up, the Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is the foundation you have been waiting for. This kit gives you the hands-on experience of completing your own frame without the need for a serial number, while maintaining the rugged reliability of a full-size polymer platform. Designed specifically for the .45 ACP and 10mm Auto crowd, this frame accepts Glock 20 and Glock 21 components, making it a versatile choice for hunters, outdoorsmen, and serious shooters. Whether you are a first-time builder or have several 80% projects under your belt, this kit offers a straightforward path to a custom pistol.

Overview

The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is more than just a block of polymer. It comes with the frame itself, a precision-machined jig, and all the necessary drill bits and pins to get the job done. The frame is molded in the iconic flat dark earth color, giving it a tactical look that stands out from standard factory frames. Because it is an 80% frame, the critical fire control pocket and pin holes are left unfinished, requiring you to complete them using the included jig. This process is legal for personal manufacture, but it demands attention to detail. The kit is compatible with Gen3 Glock 20 and Glock 21 parts, including slides, barrels, trigger assemblies, and magazines. If you have been considering a .45 or 10mm build, this is the most practical starting point on the market.

Features & Specs

This frame is built for durability and ergonomics. The PF45 uses a textured grip pattern that provides a secure hold even in wet conditions, and the integrated trigger guard undercut allows for a higher grip without sacrificing comfort. The kit includes a universal jig that simplifies the drilling and routing process, reducing the risk of costly mistakes. Below are the key specifications and features you can expect.

• Manufacturer: Polymer80, a trusted name in the 80% firearms community.
• Category: Frames, specifically designed for full-size Glock 20/21 builds.
• Compatibility: Works with Gen3 Glock 20 (10mm Auto) and Glock 21 (.45 ACP) upper and lower parts.
• Includes: PF45 frame, jig, drill bits, end mill, pins, and instruction manual.
• Color: Flat Dark Earth (FDE) with a textured grip surface.
• Finish: Requires user to complete the fire control pocket and pin holes.

The jig system is reusable, so if you decide to build multiple frames, you can purchase additional PF45 frames separately. The kit does not include a slide or barrel, giving you the freedom to choose aftermarket or factory components that fit your budget and preferences. For those who value precision, the jig indexes off the frame rails to ensure straight holes every time.

Who It Is For

This kit is ideal for the DIY enthusiast who wants a full-size pistol that is not available from other manufacturers. Hunters who prefer the stopping power of 10mm or .45 ACP will appreciate the larger frame and increased magazine capacity. Gunsmiths and hobbyists will enjoy the satisfaction of completing a frame from an 80% state, as it requires basic tools and a steady hand. It is also a great project for someone looking to learn the inner workings of a Glock-style pistol without the paperwork of a traditional transfer. Just keep in mind that this is not a drop-in solution; it demands patience and mechanical aptitude. If you are comfortable with a drill and a little elbow grease, the Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) will reward you with a reliable, personalized sidearm.

Shipping & FFL

Because this is an 80% frame, it is not classified as a firearm by the ATF and does not require transfer through a Federal Firearms License (FFL) holder. We ship this kit directly to your door with no additional paperwork. However, once you complete the frame, it becomes a firearm and must be treated as such under federal and state laws. You are responsible for ensuring that your completion and possession of this frame complies with all local, state, and federal regulations. We recommend checking your state laws regarding 80% frames before ordering, as some jurisdictions have specific restrictions. This item ships via standard ground service, and we cannot ship to P.O. boxes. Please allow 5-7 business days for delivery.