Polymer80 PF940C™ 80% Pistol Frame ONLY - polymer 80
Pros & cons
What works
- Weighs 9.8 oz — contributes to a light final build weight of ~23 oz
- Standard Glock 19 Gen 3 compatibility — vast aftermarket support
- No serial number — for builders prioritizing privacy where legal
Trade-offs
- Jig not included — adds $40-60 and sourcing time to the project
- Requires 45-60 minutes of precise milling work — not for beginners
- Polymer construction — shows wear faster than steel frames under high-round-count testing
Video review
Expert review
Specs at a glance
About this product
The Polymer80 PF940C is a compact 80% pistol frame designed for building a custom Glock 19-sized handgun. This frame arrives in an unfinished state, requiring the end user to complete the final manufacturing steps. As production has been temporarily halted, this final sale represents a limited opportunity to acquire this specific model.
What is the Polymer80 PF940C used for?
The PF940C is used to build a functional handgun, legally, by completing the final 20% of the manufacturing work yourself. This involves milling out the fire control pocket and drilling the pin holes using a jig (sold separately). The completed frame is compatible with standard Glock 19 components, allowing for a high degree of customization. It is intended for experienced builders who understand the legal requirements and possess the necessary tools.
How does the Polymer80 PF940C compare to the .308 80% Lower – Billet?
The PF940C polymer pistol frame is fundamentally different from our .308 80% Lower – Billet, which is a metal receiver for a rifle platform. The polymer frame weighs 9.8 ounces compared to the 1.2-pound billet aluminum lower, making it significantly lighter for a handgun application. The .308 lower is better for building a precision rifle, while the PF940C is optimized for a compact, concealable handgun.
What does it weigh and what are the dimensions?
The unfinished PF940C frame weighs 9.8 ounces and measures 7.2 inches in length, 1.3 inches in width, and 5.0 inches in height. These dimensions are specific to the unfinished frame prior to any milling or finishing work. The weight is a critical factor for a carry pistol, and this frame contributes to an overall build weight of approximately 23 ounces when completed with a slide and barrel.
Who is this NOT for?
This frame is not for first-time builders or individuals unfamiliar with firearms manufacturing laws and techniques. The process requires precision drilling and milling with specific tools like a hand drill and a Dremel tool or mill. Individuals seeking a ready-to-shoot firearm should purchase a complete pistol from a licensed dealer instead of an 80% frame.
What's in the box?
The box contains only the unfinished Polymer80 PF940C frame; no jig, drill bits, or pins are included. You receive a single polymer frame blank that requires a separate jig, typically purchased in a kit like the Polymer80 Jig Kit, to complete. This bare-bones offering keeps the initial cost down for builders who may already own the necessary tooling.
Is the Polymer80 PF940C worth it at $160.99?
At $160.99, the PF940C is worth it for builders who value the specific ergonomics and customization potential of this platform and can source their own jig. The price is competitive for an 80% frame of this quality, but the total project cost will be higher once the jig, tools, and all other components are acquired. For those with the skills, it represents a path to a highly personalized handgun not available off the shelf.
Key attributes
| Model | PF940C |
| Type | 80% Pistol Frame ONLY |
| Compatibility | Glock 19 Gen 3 |
| Material | Polymer |
| Weight | 9.8 oz |
| Finish | Unfinished |
| Condition | New |
Specifications
| model | PF940C |
| type | 80% Pistol Frame ONLY |
| material | Polymer |
| category | Brands |
Materials
- polymer
Frequently asked questions
- Is it compatible with Glock 19 slides?
- Yes, the completed PF940C frame is designed to be fully compatible with Generation 3 Glock 19 slides, barrels, and internal parts. You will need a complete upper parts kit and a lower parts kit, which are widely available from retailers like Brownells or MidwayUSA. Ensure all components are for the Glock 19 Gen 3 model.
- Does the frame include a jig?
- No, this is a frame-only product and does not include the required jig for completing the 80% lower. The jig is a critical tool that guides your drilling and milling operations. You must purchase a compatible jig separately, which typically adds $40 to $60 to the total project cost.
- How long does shipping take?
- Standard processing time is 3-5 business days before shipment. Ground shipping typically adds another 5-7 business days for delivery within the continental United States. Expedited shipping options are available at checkout for faster delivery, usually 2-3 business days.
- Can I return it if I make a mistake during the build?
- No, returns are not accepted for 80% frames that have been altered, drilled, or milled. Once you begin the manufacturing process, the frame is considered a firearm component and is non-returnable. It is essential to follow the instructions precisely to avoid errors that render the frame unusable.