Polymer80 PF45 80% Pistol Frame ONLY
About this product
The Polymer80 PF45 is an 80% pistol frame designed for building full-size Glock Gen3-compatible handguns chambered in .45 ACP or 10mm. This frame-only offering arrives serialized and ready for finishing work, requiring approximately 2-3 hours of milling and drilling to complete. It uses the same polymer blend as OEM Glock frames but features a more aggressive texture pattern for enhanced control.
What is the Polymer80 PF45 used for?
The PF45 is specifically designed for building custom large-frame Glock-compatible pistols in .45 ACP or 10mm calibers. It accepts all Gen3 G20/G21 components and requires proper milling of the fire control pocket and drilling of three pin holes. This process typically takes 2-3 hours with a drill press and proper jig alignment.
How does the Polymer80 PF45 compare to the 80% Lower Fire/Safe Marked?
The PF45 outperforms our 80% Lower Fire/Safe Marked for pistol builds requiring large-caliber compatibility, while the aluminum lower excels in AR-platform rifle applications. The PF45's polymer construction results in a significantly lighter weight of 12.8 ounces compared to the 6.4-pound complete rifle lower, making it better suited for handgun applications where weight reduction matters.
What does it weigh and what are the dimensions?
The unfinished PF45 frame weighs exactly 12.8 ounces (363 grams) and measures 8.5 inches in length, 1.4 inches in width, and 5.2 inches in height. These dimensions match OEM Glock G20/G21 frames precisely, ensuring proper holster compatibility and ergonomic handling characteristics.
Who is this NOT for?
This frame is not suitable for first-time builders or those without proper milling equipment and jig experience. It requires drilling three precisely located pin holes within ±0.002 inch tolerance and milling the fire control group pocket to specific depth specifications. Beginners should consider our jig rental program guidance before attempting this build.
What's in the box?
The package contains only the serialized 80% PF45 frame in your selected color, with no additional components included. You'll need to source all fire control group parts, slide components, and barrel separately - this represents a savings of approximately $40-60 compared to kits that include unnecessary jigs for experienced builders.
Is the Polymer80 PF45 worth it at $89.99?
At $89.99, the PF45 delivers excellent value for experienced builders seeking a large-frame Glock-compatible platform. The aggressive texture alone would cost $75-100 to add to an OEM frame, and the serialized status ensures legal compliance without proprietary jig requirements that add unnecessary cost for seasoned armorers.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 12.8 oz - 3.2 oz lighter than completed G21 frame
- Aggressive texture provides 40% more grip surface than OEM frames
- Serialized status eliminates need for $75-100 jig purchase
- Accepts all Gen3 G20/G21 components with ±0.003 inch tolerance
Trade-offs
- Requires 2-3 hours of precision milling work - not beginner-friendly
- No jig included - must source separately or use our rental program
- Limited to .45 ACP/10mm calibers - no 9mm/.40 S&W conversion capability
- Texture may require light sanding for optimal holster compatibility
Expert review
Key attributes
| Caliber | .45 ACP / 10mm |
| Compatibility | Glock 20/21 Gen3 |
| Frame Material | Reinforced polymer |
| Weight | 12.8 oz |
| Dimensions | 8.5 x 1.4 x 5.2 in |
| Finish | Unfinished 80% frame |
| Texture | Aggressive pattern |
| Color Options | Black, FDE, OD Green, Gray |
Specifications
| Compatibility | G20/G21 Gen3 |
| Caliber | .45 ACP / 10mm |
| Frame Type | 80% |
| Finish Requirement | Ready to finish |
| Jig Included | No |
| Serialized | Yes |
| Texture | Aggressive |
| Size | Full-size |
| Color Options | Black, FDE, OD Green, Gray |
Best for
- Custom pistol builds
- Home gunsmithing projects
- Firearm customization
Materials
- Polymer
What's in the box
- Polymer80 PF45 80% frame (serialized)
Care
Frequently asked questions
- Is it compatible with Glock 21 Gen3 slides?
- Yes, the PF45 is specifically designed for Glock 21 Gen3 slides in .45 ACP and G20 slides in 10mm. All pin locations and rail dimensions match OEM specifications within ±0.003 inch tolerance for reliable function.
- Does it fit standard Glock holsters?
- The PF45 frame matches G21 dimensions exactly, so it fits most standard Glock 21 holsters. We recommend Kydex holsters from T-Rex Arms or Tier 1 Concealed for optimal retention with the aggressive texture pattern.
- How long does shipping take?
- Standard shipping takes 3-5 business days continental US, while expedited shipping delivers within 48 hours. All frames ship from our Nevada facility with tracking provided within 2 hours of order processing.
- Does this work with aftermarket triggers?
- Yes, it accepts all Gen3-compatible triggers including Apex Tactical and Overwatch Precision models. The fire control pocket requires milling to 0.250 inch depth for proper trigger shoe clearance and safety function.