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) is a precision-engineered platform designed for builders who require a large-frame pistol foundation. This kit provides the structural components necessary to complete a full-size .45 ACP or 10mm Auto pistol build using Gen 3 Glock 20 or Glock 21 compatible parts. The frame is constructed from a proprietary high-impact polymer blend that resists flex under heavy recoil, and the included polymer jig ensures accurate drilling and machining of the three pin holes and trigger housing pocket. Each kit is manufactured to Polymer80s established tolerances, matching factory specifications for rail alignment and locking block placement.

Features and Specs

This Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) includes the unfinished frame, a reusable drill jig with hardened steel drill bushings, and all necessary endmill bits for the trigger housing pocket. The frame features an integrated 1913 Picatinny accessory rail for mounting lights or lasers, a flared magazine well for faster reloads, and aggressive front and rear slide serrations. The jig is molded from impact-resistant polymer and indexes directly off the frames existing geometry to prevent misalignment during machining.

• Unfinished 80% frame requires drilling of three pin holes and machining of the trigger housing pocket; compatible with all Gen 3 Glock 20 and Glock 21 internal parts, slides, barrels, and magazines.
• Frame dimensions: 8.1 inches overall length, 1.3 inches width at slide rails, 5.5 inches height; weight 2.9 ounces (frame only); accepts standard large-frame Glock holsters.
• Kit contents: PF45 frame, reusable polymer jig, two drill bits (2mm and 3mm), one 3/16 inch endmill bit, one 1/4 inch endmill bit, safety glasses, and illustrated assembly instructions.

Who It Is For

This kit is intended for experienced hobbyists and firearms builders who possess a drill press or hand drill, a vise, and basic gunsmithing tools. The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) is suitable for individuals building a full-size pistol for range use, hunting sidearm applications, or custom project builds. Builders should have prior experience completing 80% frames or equivalent mechanical assembly work, as the process requires precise depth control and alignment. This product is not recommended for first-time 80% builders due to the larger frame geometry and tighter machining tolerances compared to compact frames.

• Suitable for builders constructing a Glock 20 (10mm Auto) or Glock 21 (.45 ACP) pistol from individual parts.
• Requires aftermarket slide assembly, barrel, lower parts kit, and magazines not included in this kit.
• Ideal for shooters who want a dedicated large-frame pistol with a custom color or stippling finish applied after completion.

Shipping and FFL

The Polymer80 PF45 80% Full Size Frame and Jig Kit (Glock 20/21 Compatible) ships directly to your residence or business via UPS Ground. No Federal Firearms License (FFL) transfer is required for this product because it qualifies as an unfinished firearm frame under current ATF regulations. However, once the frame is machined to a functional state, federal law requires it to be assembled into a firearm that cannot be transferred or sold without a serial number. Buyers must comply with all state and local laws regarding the possession and completion of 80% frames. Some states and municipalities may restrict or prohibit the purchase of unfinished frames; it is your responsibility to verify legality before ordering. Signature may be required upon delivery.

• No FFL transfer needed for purchase; frame ships as a non-firearm component.
• Standard ground shipping within the contiguous United States; expedited options available at checkout.
• By purchasing this product, you confirm you are legally eligible to possess firearms and are not prohibited from doing so under state or federal law.