About this product

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) represents a purpose-built solution for builders seeking a large-frame pistol platform. Designed to accept Glock 20 and Glock 21 upper assemblies, this 80% frame allows you to complete a legally manufactured firearm at home without serialization requirements. The kit includes the precision-machined polymer frame and the proprietary jig system necessary for final finishing. As a leading option in the 80% frame market, this Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) delivers the structural integrity and ergonomics expected from a full-size duty frame.

Features and Specs

Every Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is manufactured to strict tolerances using impact-resistant polymer. The jig simplifies the final milling and drilling operations required to complete the frame. Below are the core specifications and design features.

• Frame material: Reinforced polymer with steel locking block insert for durability under recoil
• Compatibility: Accepts OEM and aftermarket Glock 20 (10mm Auto) and Glock 21 (.45 ACP) slide assemblies, barrels, and lower parts kits
• Jig system: Includes alignment pins, drill bushings, and router templates to guide completion of the trigger housing pocket and pin holes

Additional design elements of this kit include an integrated 1913 Picatinny accessory rail, aggressive front and rear slide serrations on the frame, and an ergonomic grip angle. The frame accepts standard Glock large-frame magazines. The kit does not include the slide, barrel, or lower parts.

Who It’s For

This kit is intended for individuals who possess the mechanical skill and tooling to complete an 80% frame. It is suited for hobbyists, custom builders, and those who want to assemble a full-size pistol from the ground up. The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) appeals to shooters who prefer the 10mm or .45 ACP cartridge and want a frame that accepts aftermarket components for a fully personalized build. It is not a finished firearm; it requires drilling, routing, and final assembly. Users should be comfortable with hand tools, a drill press or Dremel, and basic gunsmithing techniques. This kit is not recommended for first-time builders, as the large-frame platform demands precise work.

Shipping and FFL

This item ships directly to your residence within the United States. Because the Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is classified as an unfinished, non-firearm frame, it does not require transfer through a Federal Firearms License (FFL) holder at the time of purchase. However, it is your responsibility to verify that possession and completion of this kit are legal under all applicable federal, state, and local laws. Some states and municipalities restrict or prohibit 80% frames, unserialized firearms, or DIY firearm manufacture. By purchasing this product, you confirm that you are not prohibited from possessing firearms under federal law and that you will comply with all legal requirements to serialize the completed frame if mandated by your jurisdiction. We reserve the right to refuse or cancel orders that appear to violate any laws. No refunds are offered for orders that cannot be delivered due to legal restrictions in your area.