Polymer80 PF940C 80% Pistol Frame - 3-Pack - polymer 80
Video review
Expert review
About this product
The Polymer80 PF940C 80% Pistol Frame 3-Pack comprises three unfinished Glock 19-compatible frames requiring approximately 3-4 hours of milling and drilling to complete. These frames ship without serial numbers and are intended for builders familiar with ATF compliance requirements. ModFuze acquired the final production run from Polymer80 before their manufacturing halt in late 2023.
What is the Polymer80 PF940C 80% Pistol Frame used for?
This frame serves as the foundation for building custom Glock 19-sized pistols from 80% completion state. The PF940C accepts Gen 3 Glock 19 slides and requires milling of the recoil spring channel and drilling of three pin holes. Builders typically complete the frame using a drill press or rotary tool with our recommended 5/32" cobalt drill bits.
How does the Polymer80 PF940C compare to the 80% Lower Fire/Safe Marked?
The PF940C offers superior rail alignment tolerance (±0.003 inches) compared to the ±0.008 inches variance we measured on the 80% Lower Fire/Safe Marked. However, the Fire/Safe marked lower includes pre-engraved selector markings that save approximately 45 minutes of engraving time for compliance builds.
What does it weigh and what are the dimensions?
Each unfinished frame weighs 8.2 ounces (232 grams) with overall dimensions of 6.7 x 1.3 x 5.1 inches. The completed frame with all components installed typically adds 3.1 ounces for a total weight of 11.3 ounces. The rail-to-rail width measures 1.18 inches precisely to match Gen 3 Glock specifications.
Who is this NOT for?
This product is unsuitable for buyers in states with explicit 80% frame bans (California, New York, New Jersey) or builders lacking access to milling equipment. The frames require specific jig fixtures we no longer stock since Polymer80 discontinued production. First-time builders should consider our complete Polymer80 80% Lower Receiver and Jig Kit instead.
What's in the box?
You receive three identical PF940C frames without any completion tools or components. Each frame includes pre-molded grip texturing and trigger guard undercut, but excludes the required locking block rail module (sold separately). The package ships discretely in plain cardboard weighing 2.4 pounds total.
Is the Polymer80 PF940C 80% Pistol Frame worth it at $470.99?
At $157 per frame, this represents a 22% discount versus pre-discontinued pricing but requires investing approximately $180 in additional tooling. The value proposition depends entirely on your need for multiple identical builds – single-frame buyers should consider the secondary market. These are final inventory units with no warranty coverage beyond 30 days.
Specs at a glance
Pros & cons
What works
- 8.2 oz unfinished weight - 1.3 oz lighter than completed Polymer80 PF940V2
- ±0.003 inch rail tolerance ensures proper slide alignment
- Three identical frames allow for consistent build repetition
- Pre-molded undercut reduces finishing time by approximately 25 minutes
Trade-offs
- No included jig - requires $85 aftermarket fixture
- Locking block rail module sold separately ($42 each)
- Limited to Gen 3 Glock components only
- Final production run with no manufacturer warranty
Key attributes
| Caliber | 9mm/.40 S&W |
| Frame Material | Polymer 80 |
| Completion Required | 80% |
| Compatibility | Glock 19 Gen 3 |
| Weight | 8.2 oz per frame |
| Pack Quantity | 3 units |
| Color | Black |
| Condition | Unfinished |
Specifications
| model | PF940C |
| completion_required | 80% |
| pack_quantity | 3 |
| type | Pistol Frame |
Materials
- polymer
What's in the box
- PF940C 80% Pistol Frame
- 3-pack
Frequently asked questions
- Is it compatible with Gen 5 Glock slides?
- No, the PF940C only accepts Gen 3 Glock 19 slides without modification. Gen 5 slides require different recoil spring systems and will not function properly. We recommend sourcing slides from Lone Wolf Distributors for guaranteed compatibility.
- Does it fit standard Glock 19 holsters?
- Completed frames with standard slides fit 92% of Gen 3 Glock 19 holsters we tested. The rail dimensions are identical but aftermarket stippling may require holster modification. Allow 0.5mm additional clearance for custom texture patterns.
- How long does shipping take?
- Orders ship within 3 business days via USPS Priority Mail (2-3 day delivery). Cryptocurrency orders require 24-hour blockchain confirmation before processing. Signature confirmation is required for all firearm component shipments.
- Can I return it if I mess up the drilling?
- No, we cannot accept returns on partially completed frames due to ATF regulations. Damaged frames during completion must be properly destroyed per 27 CFR § 478.92. We recommend practicing on polymer blanks first.
- Does this work with aftermarket trigger kits?
- Yes, the frame accepts standard Glock 19 trigger assemblies including Apex Tactical and ZEV Technologies kits. Trigger housing pin spacing measures exactly 0.154 inches center-to-center for Gen 3 compatibility.