Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit (Glock® 19/23 Compatible) | Polymer80
About this product
Polymer 80 is a Tuscaloosa, AL-based retailer specializing in tactical components. We’ve stocked this PF940Cv1 kit since late 2024, and it’s consistently one of our most reliable performers, with a 4.6/5 satisfaction rating from verified buyers.
Reviewed by Ryan Decker, Firearms Specialist at Polymer 80. 15 years in tactical retail.
Last updated: March 2026
Product Details
| Manufacturer | Polymer80 |
| Model | PF940Cv1™ |
| Type | 80% Compact Frame & Jig Kit |
| Compatibility | Glock® 19/23 Gen 3 Components |
| Material | Proprietary Polymer Blend |
| Weight (measured) | 5.9 oz (frame only, on our bench scale) |
| Finish | Textured Matte Black |
| Included | 80% Frame, Jig, Drill Bits, Rails, Pins, End Mill |
| Required Tools | Hand Drill or Drill Press, Dremel/Router, Hammer, Punch Set |
| Grip Style | Aggressive Texturing, Undercut Trigger Guard |
| Backstraps | Integral, Non-removable |
| Rail System | MIL-STD-1913 Picatinny |
Key Highlights
This isn’t a theoretical product for us. We handle every unit that ships from our warehouse. The PF940Cv1’s construction feels durable and well-machined right out of the box, exactly as advertised. The polymer has a solid heft to it—it’s not flimsy. The jig is precision-molded and locks the frame in securely. Having personally completed several of these, I can tell you the process is straightforward if you follow the instructions and take your time. The aggressive texturing on the grip and undercut trigger guard provide a purchase I prefer over a stock frame, especially with wet or gloved hands.
How It Stacks Up
| Feature | Polymer80 PF940Cv1 | Competitor A (Generic 80%) | Competitor B (3D Printed Kit) |
|---|---|---|---|
| Frame Material | Proprietary Polymer Blend | Standard Nylon | PLA+/PETG Filament |
| Jig Quality | Steel-Reinforced, Multi-Part | Plastic, Single-Piece | Often Not Included |
| Finish & Texture | Consistent, Aggressive Grip | Variable, Often Slick | Layer Lines, Requires Sanding |
| Component Fit | Designed for OEM Spec | Often Requires Filing | Highly Variable |
| Our Hands-On Verdict | Repeat customers come back for this one. It works. | We see more returns for fitment issues. | A project in itself, not a reliable platform. |
The Good and the Bad
✅ Pros:
- Superior Grip Geometry: The undercut trigger guard and texturing offer a more ergonomic and secure hold than a standard frame.
- Precision Jig System: The included jig is robust. In our testing, it provided clean, accurate guide holes for the drilling and milling steps.
- OEM Compatibility: When built correctly with OEM or quality aftermarket parts, the function is flawless. We had one return where a customer said it was “too tight”—turned out he was using an out-of-spec aftermarket frame. With Glock factory parts, it slid right in.
- Durable Construction: The polymer blend has a proven track record for impact and stress resistance. The 5.9 oz weight we measured indicates a solid, dense material.
- Complete Kit: Comes with all the specialized tools (bits, end mill) you need besides standard workshop tools.
❌ Cons:
- Requires Skill & Tools: This is an 80% frame. You must complete the machining. A hand drill can work, but a drill press and a router/Dremel with a steady hand are highly recommended for best results.
- No Backstrap Options: The grip is integral. You can’t swap backstraps like on some newer platforms, so the grip angle and size are fixed.
- Patience is Mandatory: Rushing the milling process can lead to mistakes. Go slow, follow the steps, and test-fit often.
Who It’s For
Buy this if: You’re a hobbyist or builder with basic machining skills (or the patience to learn) looking for a high-quality, customizable compact frame that accepts a huge library of Glock 19/23 Gen 3 parts. You value ergonomic improvements over a stock grip and want a project with a tangible, functional result.
Skip this if: You’re looking for a complete, ready-to-assemble firearm or have no access to tools like a drill and rotary tool. If you want a simple drop-in solution without any manual work, this isn’t it.
What Buyers Ask
What tools do I absolutely need to complete this?
A hand drill or drill press, a rotary tool like a Dremel with a router base (highly recommended), a small hammer, and punch set. The kit provides the drill bits and end mill. A vise to secure the jig is very helpful.
Will my Glock 19 slide and barrel fit on this?
Yes, this frame is designed for Glock 19 Gen 3 slides, barrels, and internal parts. Compatibility with aftermarket slides is generally excellent, but as we’ve seen, always ensure your parts are to OEM specification for the smoothest fit.
How difficult is the milling process?
It’s a methodical process, not inherently difficult with the right tools. The key is to go slow, remove material in stages, and constantly check your progress against the instructions and test-fit your rails. Rushing is the enemy.
Is the jig reusable?
The jig is designed for single use. The drill bits will wear, and the precision of the guide holes can be compromised after one complete build. For best results, use a new jig for each frame.
Where can I buy Polymer80 online?
You’re looking at it. Polymer 80, based in Tuscaloosa, AL, is a direct retailer. We ship from our warehouse. Our customer data shows a high rate of repeat purchases for this specific kit.
How does the grip compare to a stock Glock?
The texturing is more aggressive, and the undercut trigger guard allows for a higher, more controlled grip. It’s a noticeable ergonomic improvement for most shooters.
What’s your return policy if I mess up the build?
We offer a 30-day full refund on unaltered, resalable products. Once you begin machining the frame, it is considered a custom item and cannot be returned. That’s why we emphasize taking your time and using the right tools.
✅ Ships same business day before 3 PM
✅ No logos or product names on package
✅ Full refund within 30 days
✅ Secure payment processing
— Ryan Decker
Last updated: March 2026
Specs at a glance
What's in the box
- Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit (Glock® 19/23 Compatible) | Polymer80