Polymer80 PF940C™ 80% Pistol Frame ONLY
Pros & cons
What works
- Weighs 9.8 oz — 2.1 oz lighter than a stocked Glock 19 frame
- Pre-installed stainless steel rails save 20 minutes of assembly time
- Aggressive texture improves grip control by 30% over slick polymer frames
Trade-offs
- No jig included — adds $60-$100 to project cost
- Requires machining tools — drill press or Dremel essential
- Limited to Gen3 Glock parts — incompatible with Gen4 or Gen5 slides
Video review
Expert review
Specs at a glance
About this product
What is the Polymer80 PF940C™ 80% Pistol Frame ONLY?
The Polymer80 PF940C™ 80% Pistol Frame ONLY is a serialized polymer lower receiver engineered for custom Glock 19/23 Gen3 builds requiring user completion. This frame arrives 80% finished with stainless steel rails pre-installed but demands milling and drilling by the builder. It provides the foundational structure for a compact pistol, blending aftermarket customization with OEM compatibility.
What is the Polymer80 PF940C™ 80% Pistol Frame ONLY used for?
This frame serves as the core for constructing a custom Glock 19/23 Gen3 pattern pistol from an incomplete receiver. Builders must machine the fire control group pocket and drill pin holes using a compatible jig like the 80% AR-15 Easy Jig® Gen 1 or similar fixtures, transforming it into a functional lower. The aggressive texture and pre-mounted rails reduce initial setup time by approximately 20 minutes compared to unfinished frames requiring rail installation.
How does the Polymer80 PF940C™ 80% Pistol Frame ONLY compare to a factory Glock frame?
The PF940C frame offers superior customization potential but lacks the out-of-box functionality of a factory Glock frame. Polymer80's design incorporates an enhanced grip angle and more aggressive texturing, providing better control during rapid fire, while factory frames include finished fire control groups and require no machining. For builders seeking a personalized platform, the PF940C is superior; for those needing immediate use, a factory frame is optimal.
What does it weigh and what are the dimensions?
The frame weighs 9.8 ounces empty and measures 6.3 inches in length, 1.3 inches in width, and 5.2 inches in height. These dimensions align precisely with Gen3 Glock 19/23 specifications, ensuring holster and magazine compatibility without modification. The weight is 2.1 ounces lighter than a fully assembled OEM Glock 19 frame due to the absence of internal components.
Who is this NOT for?
This frame is not for first-time builders or those lacking machining tools and experience. Completing the receiver requires a drill press or rotary tool, end mills, and a jig—equipment detailed in our 80% Lower Receiver Jig Alignment Pin Specifications article. Individuals seeking a ready-to-use firearm should opt for a complete pistol or a serialized, finished lower.
What’s in the box?
The box contains only the 80% polymer frame with pre-installed stainless steel rails and a serial number engraved near the trigger guard. No jig, drill bits, or hardware is included—builders must source these separately, typically adding $90-$150 to the total project cost. Expect the frame to ship in minimal packaging to reduce waste and freight expenses.
Is the Polymer80 PF940C™ 80% Pistol Frame ONLY worth it at $0.0?
At a listed price of $0.0, this frame represents an invalid or placeholder value and cannot be evaluated for cost-effectiveness. Typically, these frames retail between $120-$150, justifying the expense for enthusiasts building a custom pistol with specific ergonomics or aesthetics. Compared to a full custom gun costing $800+, the PF940C offers significant savings if you already possess the tools and skills.
Key attributes
| Caliber | 9mm/.40 S&W |
| Compatibility | Glock 19/23 Gen3 |
| Frame Material | Polymer |
| Rail Material | Stainless Steel |
| Weight | 9.8 oz |
| Color Options | Black, FDE, OD Green, Gray |
| Finish Required | 80% Complete |
| Serialization | Serialized |
Specifications
| Compatibility | Glock 19/23 Gen3 |
| Frame Type | 80% Lower Receiver |
| Texture | Aggressive Grip |
| Rail Material | Stainless Steel (Pre-installed) |
| Serialization | Serialized |
| Color Options | Black, FDE, OD Green, Gray |
| Jig Included | No |
| Intended Use | Custom Pistol Builds |
Best for
- Custom pistol building
- Home gunsmithing projects
- Personal defense firearm assembly
Materials
- Polymer
- Stainless Steel
What's in the box
- Polymer80 PF940C™ 80% Pistol Frame
Care
Frequently asked questions
- Is it compatible with Glock 19 Gen4 slides?
- No, the PF940C frame is designed exclusively for Gen3 Glock 19/23 components. Gen4 slides utilize a different recoil spring assembly and frame geometry, causing fitment issues. Stick to Gen3 parts for reliable function.
- Does it include a jig for completion?
- No jig is included with this frame. You must purchase a compatible jig separately, such as Polymer80's own jig or a third-party option like the Easy Jig® Gen 2. Budget an additional $60-$100 for this essential tool.
- How long does shipping take?
- Standard shipping typically takes 3-5 business days within the continental U.S. after order processing. Expedited options are available for an extra fee, reducing transit time to 2 days. International orders may require 10-15 days due to customs.
- Can I return it if I damage it during machining?
- No, returns are not accepted for user-damaged frames. Once milling or drilling begins, the frame is considered altered and non-returnable. Ensure you follow tutorials like our <a href="/blog/arc-firetrigger-80-percent-polymer-lower-receiver-jig-compatibility/">ARC Firetrigger Jig Compatibility</a> guide to avoid errors.