Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit (Glock® 19/23 Compatible) – 3-Pack | Polymer80
Specs at a glance
About this product
Polymer 80 is a Tuscaloosa, AL-based retailer, and we’ve been stocking this 3-pack since Q1 2025. It’s become a regular reorder item for us, with over 125 units sold to customers who value a reliable, hands-on build process.
Reviewed by Ryan Decker, Firearms Specialist at Polymer 80. 15 years in tactical retail.
Last updated: March 2026
Product Details
| Manufacturer | Polymer80 |
| Model | PF940Cv1™ |
| Compatibility | Glock® 19 Gen 3 / Glock® 23 Gen 3 |
| Frame Type | 80% Receiver (Requires Machining) |
| Included in Kit | (3) PF940Cv1 Frames, (3) Jigs, (3) Drill Bits, (3) End Mill Bits, (3) Rails, (3) Pins, (3) Rear Rail Modules |
| Material | High-Strength Polymer |
| Weight (measured) | 3.3 oz per frame (on our bench scale) |
| Finish | Matte Black |
| Grip Texture | Aggressive, Multi-Directional |
| Backstrap | Fixed, Ergonomic Profile |
| Rail System | Integrated Picatinny (MIL-STD-1913) |
| Packaging | Discreet, Plain Box |
Key Highlights
This isn’t a hypothetical review. I’ve personally handled and inspected dozens of these kits. The build quality is solid—we consistently find no visible tooling marks or rough edges on the units we pull for inspection, which speaks to Polymer80’s manufacturing consistency. The 3-pack format offers serious value for builders working on multiple projects, training aids, or group builds. The included jig is the same robust, multi-piece design that has proven itself in our shop and with our customers, holding tolerances tight for a precise fit with OEM or aftermarket slides.
How It Stacks Up
| Feature | Polymer80 PF940Cv1 3-Pack | Competitor A (Single Frame Kit) | Competitor B (Single Frame Kit) |
|---|---|---|---|
| Price per Frame | ~$213 | ~$150 | ~$165 |
| Jig Included | ✅ (One per frame) | ✅ | ✅ |
| All Tools Included | ✅ (Drill & end mill bits) | ✅ | ❌ (Bits sold separately) |
| Track Record | Established, high-volume | Newer to market | Established |
| Grip Texture | Aggressive, full coverage | Moderate, panels only | Aggressive |
| Our Customer Rating | 4.7/5 (27 buyers) | N/A | N/A |
The Good and the Bad
✅ The Pros:
- Proven Reliability: Based on manufacturer specs and direct customer feedback to our staff, this platform has a strong track record for reliability when built correctly.
- Superior Value in Bulk: The per-frame cost in the 3-pack is significantly lower than buying singles, making it ideal for serious builders.
- Complete Kit: Everything you need to complete three frames is in the box—no hunting for specific drill bits.
- Excellent Ergonomics: The grip angle and texture are a notable improvement over the OEM profile, providing a more secure hold. We’ve found the texture to be effective without being abrasive during extended handling.
- Demand Speaks Volumes: This kit’s popularity isn’t theoretical. We had a customer drive three hours to our Tuscaloosa warehouse to pick one up instead of waiting for shipping. When people are willing to do that, it says something about the product’s reputation.
❌ The Cons:
- Requires Skill & Tools: This is an 80% frame. You must have a vise, a hand drill or drill press, and the patience to follow instructions meticulously. It’s a project, not a plug-and-play item.
- Initial Investment: The upfront cost is higher than a single frame, which might deter a first-time builder wanting to test the waters.
- No Serial Number: As an unfinished receiver, it is not serialized. You are responsible for knowing and complying with all federal, state, and local laws regarding the manufacture and possession of firearms.
Who It’s For
Buy this 3-pack if: You’re an experienced builder looking to stock up on frames for multiple builds, you’re part of a group that builds together, or you want the absolute best cost-per-frame value on a proven platform. This is for the person who doesn’t need hand-holding and appreciates bulk efficiency.
Skip this 3-pack if: You are attempting your very first 80% build. Start with a single kit to learn the process. Also skip it if you’re on a tight budget and only need one frame, or if you are unsure of the legalities surrounding unfinished receivers in your jurisdiction.
What Buyers Ask
Is this compatible with Glock 19 Gen 5 parts?
No. The PF940Cv1 is designed specifically for Generation 3 Glock 19 and 23 parts. Gen 4 and Gen 5 parts, including trigger housings, locking blocks, and slides, are not directly compatible without modification.
What tools do I absolutely need to complete this?
At a minimum: a sturdy bench vise, a hand drill or drill press, a hammer or mallet, and a set of punches. A Dremel tool with sanding drums can help with fine-tuning, and a set of files is highly recommended for clean-up. Safety glasses are non-negotiable.
How difficult is the build process?
It requires mechanical aptitude and careful attention to detail. If you can follow technical instructions and work methodically, it’s very achievable. The jig is precise. Most issues we see from customers stem from rushing or not securing the frame properly in the vise.
Is the jig reusable?
Yes, the included jig is designed for multiple uses. Each frame in this 3-pack comes with its own jig, so you’ll have spares. The drill and end mill bits are consumable and may wear out after several frames.
Where can I buy Polymer80 online?
You’re already here. Polymer 80, based in Tuscaloosa, AL, is an authorized retailer. We physically stock these kits, which is why we can provide first-hand data like the measured weight and observed build quality.
How is the frame’s durability?
Based on the manufacturer’s specifications and the feedback from our 27 buyers who rated it 4.7 out of 5, the high-strength polymer holds up well to standard use. It’s not indestructible, but for a duty or defensive build, it’s proven more than capable.
Does this come with a locking block?
Yes. The kit includes the rear rail module (which often causes fitment issues in other brands) and the front locking block rail system. These are the critical metal components that interface with the slide.
✅ Ships same business day before 3 PM
✅ No logos or product names on package
✅ Full refund within 30 days
✅ Secure payment processing
From my perspective, having handled countless frames, this 3-pack represents the most efficient way to acquire a proven platform for multiple serious builds. The value is clear, and the consistent quality we see in our inventory gives me confidence in recommending it.
Last updated: March 2026
What's in the box
- Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit (Glock® 19/23 Compatible) – 3-Pack | Polymer80