Polymer80 PF45 80% Lower Frame for Glock 20SF/21SF
Unlock the potential of custom firearm building with the Polymer80 PF45 80% lower frame, designed specifically for Glock 20SF and 21SF models. Crafted in a sleek Flat Dark Earth finish, this frame provides a robust foundation for creating your personalized 10mm or .45 ACP pistol. As an 80% lower, it requires final machining by the end-user, making it ideal for hobbyists and builders who enjoy hands-on projects while complying with applicable regulations.
Why Choose the Polymer80 PF45 Frame?
Built from high-strength polymer, the PF45 frame offers exceptional durability and reduced weight compared to traditional materials. Its ergonomic design ensures a comfortable grip, while the textured surface enhances control during use. This frame is engineered to seamlessly integrate with Glock 20SF and 21SF components, allowing for a smooth building process and reliable performance.
Key Features and Benefits
- Flat Dark Earth Finish: Aesthetic and tactical appeal with a non-reflective surface.
- Lightweight Polymer Construction: Reduces overall firearm weight without sacrificing strength.
- DIY-Friendly Design: Perfect for enthusiasts who want to customize their build from the ground up.
- Compatibility: Specifically designed for Glock 20SF (10mm) and Glock 21SF (.45 ACP) models.
- Enhanced Grip Texture: Provides secure handling in various conditions.
Specifications at a Glance
The Polymer80 PF45 frame is precision-molded to meet stringent quality standards. It includes pre-machined areas to guide the finishing process, making it accessible for builders with basic tools. Note that this is an 80% lower, meaning it is not a firearm until completed by the user, and all local, state, and federal laws must be followed during assembly.
Ideal for Custom Builds
Whether you’re constructing a high-powered 10mm for hunting or a reliable .45 ACP for personal defense, this frame serves as the perfect starting point. Its versatility allows for extensive customization, from trigger upgrades to sight modifications, ensuring your final product meets your exact needs. For more firearm options, explore our Texas Gun Store collection.
Why Buy from Texas Gun Store?
At Texas Gun Store, we combine expertise with a commitment to customer satisfaction. Our team has extensive experience in the firearms industry, ensuring you receive authoritative advice and trustworthy products. We prioritize secure transactions, fast shipping, and ongoing support for all your shooting needs. Trust us for quality gear and reliable service.

| Brand | Polymer80 |
| Model | PF45 |
| Compatibility | Glock 20SF, Glock 21SF |
| Caliber | 10mm, .45 ACP |
| Finish | Flat Dark Earth |
| Material | High-Strength Polymer |
| Type | 80% Lower Frame |
| Weight | Approx. 8 oz (unfinished) |
| Dimensions | Standard Glock 20SF/21SF frame size |





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