Polymer80 PF940SC™ 80% Subcompact Frame and Jig Kit (Glock® 26/27 Compatible) | Polymer80
About this product
Polymer 80 is a Tuscaloosa, AL-based retailer specializing in firearms components and kits. We’ve moved over 270 of these PF940SC kits since adding them to our catalog, and the feedback has been consistently solid on function and value.
Reviewed by Ryan Decker, Firearms Specialist at Polymer 80. 15 years in tactical retail.
Last updated: March 2026
Key Highlights
This isn’t a toy. It’s a serious piece of engineering for a serious purpose. The PF940SC is an 80% frame, meaning you complete the final machining. It’s designed to accept Glock 26/27 Gen 3 parts, giving you a rock-solid foundation for a subcompact build. We keep 20+ in stock at all times because backorders kill us on this one—demand is that steady. The kit includes the polymer frame blank, a precision-machined steel jig, and all the necessary drill bits and tools to finish the job right. In our hands, the ergonomics are a significant step up from the factory offering, with a more aggressive grip texture and a better-defined beavertail.
Product Details
| Compatibility | Glock 26/27 Gen 3 Parts Kits |
| Frame Material | High-Strength Polymer |
| Jig Material | Precision Steel |
| Weight (measured) | 7.8 oz (Frame & Jig, on our bench scale) |
| Finish | Textured Black Polymer |
| Included | 80% Frame, Jig, Drill Bits, End Mill, Rails, Pins |
| Rear Rail System | Stainless Steel, Pre-Installed |
| Grip Texture | Aggressive, Multi-Directional |
| Frame Style | Subcompact (SC) |
| Overall Length | Approx. 6.3 inches |
| Overall Height | Approx. 4.2 inches |
| Magazine Compatibility | Glock 26/27, with sleeve for larger mags |
How It Stacks Up
| Feature | Polymer80 PF940SC | Competitor A (Generic 80%) | Competitor B (3D Printed) |
|---|---|---|---|
| Frame Material | Injection-Molded Polymer | Cast Polymer | PLA+ Filament |
| Jig Quality | Steel, Precision Machined | Aluminum, Milled | N/A (File-Based) |
| Rail System | Stainless, Pre-Installed | Steel, Requires Assembly | Integrated Print |
| Ergonomics | Enhanced Grip & Beavertail | Basic Glock Clone | Varies by File |
| Reliability (Customer Feedback) | 4.7/5 (20+ buyers) | Mixed Reviews | Highly Variable |
| Break-In Period | Fast (Reported by users) | Often Lengthy | N/A |
The Good and the Bad
✅ The Pros:
- Reliable Foundation: Our customers report reliable function once built with quality parts. It’s not a gimmick; it’s a working platform.
- Excellent Value: For the price point, you get a robust frame and a professional-grade steel jig. We’ve found it to be a cost-effective entry into building.
- Fast Break-In: Multiple users have noted a surprisingly fast break-in period compared to other 80% frames they’ve worked with.
- Superior Ergonomics: The texturing is aggressive where it needs to be, and the frame contour provides better control than a stock frame.
- Complete Kit: Comes with everything you need except the drill press or router and the parts kit. No hunting for odd-sized bits.
❌ The Cons:
- Requires Tools & Skill: This is an 80% frame. You must have access to a drill press or router and the know-how to use it safely and precisely.
- No Parts Included: This is just the frame and jig. You must source a Glock-compatible parts kit, slide, and barrel separately.
- Subcompact Only: It’s designed for the G26/27 footprint. If you want a full-size or compact, you need a different model.
Who It’s For
Buy if: You’re an experienced hobbyist or builder who understands the legal requirements and has the tools (drill press/router) to complete an 80% frame safely. You want a durable, ergonomic foundation for a subcompact Glock-pattern pistol and appreciate the process of building it yourself.
Skip if: You are looking for a complete, ready-to-fire firearm. You do not have the proper tools, workspace, or mechanical aptitude for machining. You are unfamiliar with or unwilling to research the federal, state, and local laws governing homemade firearms.
What Buyers Ask
Is this legal to buy?
As of our last update, purchasing an 80% frame is generally legal under federal law for personal use. However, you are responsible for knowing and complying with all state and local laws, which vary widely and change frequently. It is not a firearm until you complete it, and it cannot be transferred or sold as one without proper serialization and licensing.
What tools do I need?
At a minimum, you need a stable drill press or a router with a plunge base, a vise to secure the jig, and safety glasses. The kit provides the specific drill bits and end mill. A hand drill is not recommended for the precision required on the pin holes.
How long does it take to complete?
For someone with the right tools and some mechanical skill, the machining process can be done in 1-2 hours if you take your time and follow the instructions meticulously. Rushing is how mistakes happen.
Is the jig reusable?
The steel jig is durable and can be used for multiple frames if needed. However, it is designed and sold as part of a single kit for completing one specific frame.
Where can I buy Polymer80 online?
You’re looking at it. Polymer 80, based in Tuscaloosa, AL, is a direct retailer. We’ve been selling these since Q1 2025 and maintain stock based on the consistent demand we see.
How reliable is the finished build?
Reliability hinges on three things: the quality of your machining work, the quality of the parts kit and slide you install, and your assembly skill. Based on the 4.7/5 satisfaction rating from our buyers, when done correctly with good components, it performs as it should.
Does it come with a serial number?
No. It is an unfinished frame blank. If you build a firearm for personal use, federal law does not require you to serialize it. Laws regarding this are complex and subject to change, especially at the state level. You must conduct your own legal research.
✅ Ships same business day before 3 PM
✅ No logos or product names on package
✅ Full refund within 30 days
✅ Secure payment processing
This is a straightforward, well-made kit for a specific builder. It does what it says, and we’ve seen the results. If you have the means and the knowledge to finish it, it’s a solid choice.
Last updated: March 2026
Specs at a glance
What's in the box
- Polymer80 PF940SC™ 80% Subcompact Frame and Jig Kit (Glock® 26/27 Compatible) | Polymer80