Product Overview
For the experienced firearms enthusiast seeking a personalized, full-size platform, the Polymer80 PF45™ 80% Full Size Frame and Jig Kit represents a foundational project. This is not a firearm; it is a precision-machined, unfinished polymer frame and dedicated jig system designed for user completion. Compatible with Gen 3 Glock® 20 (10mm) and Glock® 21 (.45 ACP) components, the PF45™ caters to builders who value the process of creation and desire a custom-fit handgun tailored to their specifications. It is intended for lawful completion by individuals for personal use, where permitted by law, resulting in a robust semi-automatic pistol suitable for range use, competition, or authorized duty.
Key Features
- Glock® Gen 3 Compatibility: Engineered to accept standard OEM or aftermarket Glock® 20/21 Gen 3 slides, parts kits, and barrels, ensuring wide parts availability and proven reliability.
- Enhanced Ergonomic Design: Features an integrated extended beavertail for higher hand placement and reduced slide bite, coupled with a pronounced thumb ledge for improved natural pointability and control.
- Double-Undercut Trigger Guard: Provides a significantly lower hand position for a more secure, high-grip hold, enhancing recoil management—a critical feature for powerful calibers like 10mm and .45 ACP.
- Dedicated Precision Jig System: Includes a proprietary, frame-specific jig and necessary drill bits to guide the completion process with accuracy, ensuring proper pin and component alignment.
- High-Strength Polymer Frame: Manufactured from a proprietary, reinforced polymer blend, offering a durable and lightweight foundation that meets the demands of large-frame semi-automatic pistols.
- Stainless Steel Locking Block & Rails: Comes with a stainless steel locking block and embedded rails, providing a corrosion-resistant and solid metal-on-metal interface for the slide.
Performance & Applications
The completed PF45™ frame serves as the core of a highly capable large-format handgun. When paired with a 10mm slide assembly, it forms an ideal platform for outdoor enthusiasts in backcountry regions, offering a reliable sidearm with significant stopping power. For the competitive shooter in divisions like USPSA Limited-10, a completed .45 ACP build on this frame provides a custom grip angle and texture that can improve stage times and control over standard offerings. Furthermore, as a dedicated gunsmithing project, the completion process itself offers immense educational value for individuals seeking a deeper, practical understanding of firearm mechanics and fitting, resulting in a uniquely personalized tool.
About Polymer80
Polymer80 is widely recognized as the innovator that established the modern 80% frame category. Their approach is rooted in engineering and precision manufacturing, not just prototyping. By developing proprietary polymer formulas and patented jig systems, they have set the industry benchmark for dimensional stability, component compatibility, and user-guided completion. Their extensive catalog, which includes the flagship PF45™ for large-frame applications, is a testament to their focused expertise in creating platforms that empower knowledgeable builders. The company’s reputation is built on providing serious components for serious enthusiasts, prioritizing function and fit over gimmicks.
Why Buy From Imbert Smither Arms
Located in SAN CARLOS, CA, Imbert Smither Arms operates with a focus on serving the technical needs of the firearms community. We prioritize stocking specialized components like the Polymer80 PF45™ for builders who understand specifications and compatibility. Our approach is to provide accurate product information and access to items that facilitate custom projects, ensuring customers receive the correct parts for their specific build intentions. We are a source for those engaged in detailed, lawful firearm assembly and modification.
Make Your Decision
The Polymer80 PF45™ 80% Frame and Jig Kit is a specialized product for a specific user. It is for the individual who derives satisfaction from building, fitting, and creating a handgun to their exact ergonomic preferences. If you possess the technical aptitude, tools, and commitment to complete a project to safe and proper standards—and you desire a full-size platform for potent calibers—this kit provides a proven foundation. Evaluate your local laws, your workshop capabilities, and your intent. If this aligns with your goals as a builder, the PF45™ stands as a professional-grade starting point.
Everything You Need To Build Polymer80 Or Glock Builds
Technical Specifications
Frequently Asked Questions
Is this a quality product?
Polymer80 has built their reputation on quality, and the Polymer80 PF45™ 80% Full Size Frame and Jig Kit (Glock® 20/21 Compatible) exemplifies that commitment.
What warranty is included?
Polymer80 stands behind this product with their manufacturer warranty.
What makes this product stand out?
The Polymer80 PF45™ 80% Full Size Frame and Jig Kit (Glock® 20/21 Compatible) combines quality construction with reliable performance, offering exceptional value.
Who is this product for?
This is ideal for discerning buyers who prioritize quality and reliability.
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