Polymer80 PF45 80% Pistol Frame Only

The Polymer80 PF45 80% pistol frame only is the foundational component for builders seeking a large-frame, .45 ACP or 10mm handgun. This uncompleted frame requires additional machining and finishing before it can function as a lower receiver. Designed for those who understand the legal and technical requirements of firearm construction, this frame offers a blank canvas for a custom build. As a manufacturer-direct offering from Polymer80, this frame delivers the same robust polymer construction and ergonomic design as completed frames, but without the serialized fire control group pocket and pin holes fully machined.

Overview

This Polymer80 PF45 80% pistol frame only is an unfinished lower receiver for large-frame pistol builds. It is compatible with Glock 21 and Glock 20 Gen3-style parts, allowing builders to create a custom .45 ACP or 10mm handgun. The frame is manufactured from reinforced polymer, offering durability and impact resistance. As an 80% frame, it does not constitute a firearm under federal law (as defined by the GCA) until fully machined, but builders must comply with all applicable local, state, and federal regulations. This product is sold as a raw frame only; no jig, bits, or additional tooling are included.

Features & Specs

The Polymer80 PF45 80% pistol frame only is engineered for precision and compatibility with standard Glock 21/20 parts. Key specifications include:

• Manufacturer: Polymer80. Category: Frames. Material: Reinforced polymer. Caliber compatibility: .45 ACP (Glock 21) and 10mm (Glock 20).
• Unfinished frame requires drilling of fire control pocket, trigger pin holes, and rear rail module installation. Compatible with Gen3-style trigger housings, slide stop levers, and magazine releases.
• Integrated Picatinny rail section for accessory mounting. Textured grip panels and an ergonomic palm swell for improved control. Ambidextrous magazine catch cutout pre-marked.

This frame is designed to accept standard Glock 21/20 magazines, slides, barrels, and recoil spring assemblies. The rear rail module (sold separately) must be installed to complete the lower assembly. Builders should verify compatibility with their chosen slide and barrel combination before beginning work.

Who It’s For

The Polymer80 PF45 80% pistol frame only is intended for experienced firearm builders and hobbyists who possess the necessary tools, knowledge, and legal understanding to complete a firearm frame. It is not suitable for first-time builders or those unfamiliar with drilling, pin fitting, and rail installation. This product is designed for individuals who want to build a full-size .45 ACP or 10mm pistol from the ground up, customizing grip texture, color, and component selection. It is also appropriate for those who wish to replace a damaged or worn frame on an existing build, provided the frame is legally transferred and completed in compliance with all laws. This Polymer80 PF45 80% pistol frame only is not for those seeking a ready-to-fire pistol or a quick assembly project.

Shipping & FFL

This Polymer80 PF45 80% pistol frame only ships directly to your residential or commercial address. No Federal Firearms License (FFL) transfer is required for the frame itself, as it is not considered a firearm under federal law when sold as an unfinished 80% frame. However, once you complete the frame (by machining the fire control pocket, drilling pin holes, and installing the rear rail module), it becomes a firearm subject to all federal, state, and local laws. You are responsible for ensuring that owning, building, and possessing this frame is legal in your jurisdiction. Some states and municipalities impose restrictions on 80% frames, including serialization requirements or outright bans. Always check your local laws before purchasing. We do not provide legal advice. If you complete this frame, you must comply with all applicable laws regarding firearm possession, including any requirement to serialize the finished product. No returns or exchanges are accepted on this item due to its classification and intended use.