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

Overview

The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) offers a complete platform for building a full-size pistol frame at home. Designed for Glock 20 and Glock 21 models, this kit includes the uncompleted frame and the necessary jig to finish the frame to working condition. As an 80% frame, it requires drilling, milling, and finishing steps to complete, giving the builder control over the final assembly. This kit is intended for personal use and is not a ready-to-fire firearm.

For those seeking a reliable foundation for a full-size build, the Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) delivers a precise, pre-molded frame that accepts standard Glock 20/21 parts. The included jig ensures accurate alignment for the required machining steps, reducing the chance of errors during completion.

Features and Specs

The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is manufactured by Polymer80 and falls under the category of frames. Key specifications include a full-size frame geometry compatible with Glock 20/21 slide assemblies, magazines, and lower parts kits. The frame is constructed from high-impact polymer, and the jig is made from hardened steel for repeated use.

• Full-size frame designed for Glock 20 (10mm) and Glock 21 (.45 ACP) models
• Includes precision-machined jig, drill bits, end mill, and instruction manual
• Pre-molded trigger housing pocket and rail system for drop-in installation of OEM or aftermarket parts

• Frame material: reinforced polymer with steel inserts at stress points
• Jig material: CNC-machined aluminum alloy with steel guide bushings
• Requires minor fitting: drilling of pin holes, channel milling, and trigger housing installation

• Compatible with standard Glock 20/21 slides, barrels, recoil springs, and magazines
• Accepts all Gen 3-style lower parts kits for Glock 20/21
• Overall length: 8.5 inches; height: 5.5 inches; weight: 8.5 ounces (frame only)

This kit does not include a slide, barrel, trigger assembly, or magazine. The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is sold as a non-functional frame blank requiring completion by the end user.

Who It Is For

This product is intended for hobbyists, custom builders, and individuals who prefer to assemble their own firearms from a partially finished frame. It is suitable for those with mechanical aptitude and access to basic shop tools such as a drill press or hand drill, a Dremel or rotary tool, and deburring tools. The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is not for first-time builders without prior experience in frame finishing or firearm assembly.

This kit is designed for personal use only and is not intended for resale or transfer to others as a completed firearm. Builders should ensure compliance with all applicable federal, state, and local laws before purchasing or completing this frame.

Shipping and FFL

The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is classified as a non-firearm item under federal law because it is an 80% frame that is not yet a functional firearm. It ships directly to your residential or business address without the need for a Federal Firearms License (FFL) transfer. No background check is required at the time of purchase.

However, once the frame is completed to a functional state, it becomes a firearm under federal law. Builders must comply with all legal requirements, including serialization if required by state law. Some states and localities restrict or prohibit the possession or completion of 80% frames. It is your responsibility to verify that you may legally own and complete this product in your jurisdiction. By purchasing this kit, you confirm that you are not prohibited from possessing firearms under federal or state law.