Release: Glock-Mod Polymer80 PF45 80% Pistol Frame ONLY
Video review
Expert review
About this product
The GLOCK FRT Polymer80 PF45 is an 80% pistol frame engineered for builders who demand precision compatibility with G20 and G21SF platforms. This hardened polymer chassis exemplifies Polymer80's commitment to ergonomic design and modular customization, shipping fully in-stock for immediate builds targeting 10mm and .45 ACP calibers.
What is the PF45 80% frame used for?
This frame serves as the foundation for custom G20 or G21SF builds where trigger control and grip ergonomics are non-negotiable. It accepts all Gen3 Glock internals while providing an extended beavertail and aggressive texturing that reduces muzzle flip by approximately 15% compared to stock frames. I recommend pairing it with our 3.5lb Modified Cut Nub Connector for a crisp 2.1mm take-up.
How does the PF45 compare to the Polymer80 PF940V2?
The PF45 outperforms the PF940V2 in large-frame applications but requires more precise milling. Where the PF940V2 caters to compact 9mm builds, the PF45’s 190mm length and reinforced rail system handle the substantial recoil of 10mm rounds. The PF940V2 is better for concealed carry, while the PF45 dominates in hunting or competition scenarios.
What does it weigh and what are the dimensions?
This frame weighs 10.2 ounces empty and measures 190mm in length, 34mm in width, and 130mm in height. The reduced weight—2.3 ounces lighter than a fully-machined aftermarket aluminum frame—contributes to better balance when paired with a full-size slide. Its 18° grip angle remains consistent with Glock’s iconic geometry.
Who is this NOT for?
Avoid this frame if you lack access to a drill press or jig system. The 80% completion requirement adds 60-90 minutes of machining time versus drop-in frames. Beginners should consider our pre-assembled G43 Complete Trigger Kit instead.
What's in the box?
You receive the 80% polymer frame, a locking block rail system, rear rail module, and all necessary pins. The package excludes trigger components, slide, and barrel—requiring approximately $300-500 in additional parts to complete a functional firearm. Total parts count: 4 components plus hardware.
Is the PF45 worth it at $204.52?
At this price, it delivers superior value for builders seeking a dedicated large-frame platform. Compared to a $350 machined aluminum frame, you save $145 while gaining Polymer80’s proven rail geometry. The investment justifies itself if you prioritize caliber versatility over immediate usability.
Specs at a glance
Pros & cons
What works
- Weighs 10.2 oz — 2.3 oz lighter than aluminum competitor frames
- Accepts both 10mm and .45 ACP slides without modification
- Includes reinforced steel rails rated for 15,000+ rounds
Trade-offs
- Requires 60-90 minutes of precision milling — not beginner-friendly
- No trigger components included — adds $120+ for basic function
- Grip texture may need stippling upgrade for wet conditions
Key attributes
| Caliber | 10mm / .45 ACP |
| Frame Material | Reinforced polymer |
| Weight | 10.2 oz |
| Dimensions | 190mm x 34mm x 130mm |
| Compatibility | G20 / G21SF Gen3 |
| Finish | Black textured |
| Completion | 80% |
| Rail System | Steel locking block + rear module |
Frequently asked questions
- Is it compatible with Gen4 Glock slides?
- No, the PF45 frame only accepts Gen3 G20 or G21SF slides and components. The recoil spring channel and rail dimensions differ from Gen4 specifications by 1.2mm. Use exclusively with Gen3 parts for reliable function.
- Does it fit standard Glock holsters?
- Yes, the frame maintains Glock’s OEM exterior dimensions of 190x34mm. It fits most G21 holsters from Safariland and Blackhawk. Test fitment with your specific holster model before carry.
- How long does shipping take?
- GLOCK FRT processes orders within 24 hours via USPS Priority Mail. Continental US delivery averages 3 business days. International shipments require 10-14 days through GlobalPost.
- Can I return it if I mess up the milling?
- No returns are accepted on completed or damaged 80% frames per ATF regulations. We recommend using a Polymer80 jig and 3/8” drill bit to minimize errors. Consult our milling guide video before starting.