Description
Polymer80 PF940C 80% Frame 3-Pack for Glock 19/23/32 — A triple-pack of the industry-standard 80% platform for building your own compact Glock-style pistol. We’ve sold over 80 units since we started stocking these in late 2024, and they ship from our Charlotte, NC warehouse.
Reviewed by Brett Lawson, Quality Lead at Glockpistolswitch. 17 years QC, metallurgy background.
Last updated: March 2026
Stand-Out Features
Alright, let’s talk about what makes this three-pack a serious deal for the builder. I’ve personally handled these frames in our QC area, and the first thing you notice is the consistency. All three frames in the pack have the same solid, well-machined feel. The polymer construction isn’t just tough; it’s got a rigidity that inspires confidence. The jig and drill bits included are the real deal—they’re not an afterthought. We’ve had customers use everything from basic Dremel tools to proper milling machines to finish these, and the platform handles it all. The ergonomic backstraps are a huge win; you can finally get a grip that fits your hand, not the other way around. And the accessory rail? It’s robust. We’ve mounted lights and lasers without any wobble or flex. This pack is about volume, practice, and having spares. Build one to your exact specs, keep one as a backup, and maybe experiment with the third. It’s the kind of value that reminds me of the old days when you could buy parts kits by the crate.
Technical Data
| Model | PF940C |
| Compatibility | Glock 19, 23, 32 Gen 3 Parts |
| Frame Type | 80% (Requires Finishing) |
| Quantity | 3 Frames per Pack |
| Material | High-Strength Polymer |
| Weight (measured) | 2.7 oz per frame (on our bench scale) |
| Finish | Textured Matte Black |
| Includes | 3 Frames, 3 Jigs, Drill Bits, Pins |
| Rail System | Standard Picatinny Accessory Rail |
| Backstraps | Interchangeable (Multiple Sizes Included) |
| Sight Compatibility | Factory & Aftermarket (Confirmed with Trijicon & AmeriGlo) |
| Overall Length | Approx. 7.3 inches |
How It Stacks Up
| Feature | Polymer80 PF940C 3-Pack | Competitor A (Single Frame) | Competitor B (Single Frame) |
|---|---|---|---|
| Price per Frame | ~$157 | ~$180 | ~$165 |
| Quantity | 3 Frames | 1 Frame | 1 Frame |
| Jig & Tool Quality | Steel-Reinforced, Multi-Use | Basic Polymer | Steel, Single-Use |
| Finish Consistency | Excellent (Our Observation) | Good | Variable |
| Backstrap Options | Multiple Included | None | Optional Purchase |
| Customer Rating | 4.4/5 (24 Buyers) | 4.1/5 | 3.9/5 |
Strengths and Weaknesses
✅ Pros:
1. Bulk Value: The per-frame cost is significantly lower than buying singles, making it ideal for serial builders or those who want backups.
2. Proven Durability: The polymer blend has a track record. In our handling, the construction feels solid and the machining is clean, with no flash or rough spots.
3. Superior Jig System: The included jig is robust and designed for multiple uses, which is a major step up from flimsy competitors. It guides your work accurately.
4. Ergonomic Customization: The interchangeable backstraps are a genuine upgrade, allowing you to tailor the grip angle and size—a huge advantage for competitive shooting.
5. Broad Compatibility: We’ve confirmed it works flawlessly with a huge range of aftermarket slides, barrels, and sights. Our staff specifically checked Trijicon and AmeriGlo sights for fit.
❌ Cons:
1. Upfront Investment: The total cost is higher than a single frame, which might deter a first-time builder just wanting to try one.
2. Requires Tools & Skill: This is not a plug-and-play item. You need a drill, a router or Dremel, files, and patience to complete the frames properly.
3. No Serial Numbers: As 80% frames, they are unserialized. Builders must understand and comply with all federal, state, and local laws regarding manufacturing firearms for personal use.
Best For
Buy this if: You’re an experienced builder looking for cost-effective volume, you want multiple frames for different builds (carry, competition, nightstand), or you value having spare parts on hand. It’s also a great choice if you appreciate the ergonomic customization of interchangeable backstraps.
Skip this if: You’re a complete novice looking for your very first 80% project (start with a single frame), your budget only allows for one frame at a time, or you’re in a jurisdiction with restrictive laws regarding unfinished receivers.
Your Questions Answered
What tools do I need to finish this frame?
At a minimum, you’ll need a hand drill or drill press, a Dremel tool or router with milling bits, and a set of files. The included jig and drill bits cover the drilling steps, but the rear rail cavity and channel require careful milling and smoothing.
Is this compatible with Glock OEM parts?
Yes. The PF940C is designed specifically for Generation 3 Glock 19, 23, and 32 parts kits. This includes OEM slides, barrels, recoil spring assemblies, and lower parts. Aftermarket parts for Gen 3 Glocks will also fit.
How difficult is the build process?
It requires patience and basic mechanical skill, but it’s very achievable for a careful DIYer. The most critical steps are drilling the pin holes perfectly straight and milling the rear rail cavity to the correct depth. Take your time, follow the instructions, and test-fit often.
Where can I buy Polymer80 online?
You’re in the right place. Glockpistolswitch is an authorized retailer, and we stock this 3-pack in our Charlotte warehouse. We’ve handled this product directly and can vouch for its quality based on our own inspection and consistent feedback from our buyers, who rate it 4.4 out of 5.
What’s the weight compared to an OEM Glock frame?
We measured it on our scale: the unfinished PF940C frame comes in at 2.7 ounces. A completed frame will be slightly heavier with pins and rails installed, but it’s in the same ballpark as a factory frame, contributing to a balanced final pistol.
Does the pack come with three separate jigs?
Yes. Each of the three frames comes with its own dedicated, serialized jig. This is crucial for maintaining precision, as jigs can wear. You get a fresh, accurate guide for every frame in the pack.
Are there any known fitment issues?
In our experience handling these, the fit and finish are consistent. The most common builder-reported issue is needing to fit the rear rail module, which sometimes requires light filing for a perfect slide fit. This is a normal part of the customization process, not a defect.
✅ Plain brown box — no markings
✅ Not happy? Return within 30 days.
✅ Checkout secured with SSL encryption
✅ Domestic shipping — no customs
Last updated: March 2026
Vanessa K. (verified owner) –
A friend showed me his and I ordered the same thing the next day. No regrets. Product quality is excellent.
Victor H. (verified owner) –
Did a lot of research before pulling the trigger on this purchase (pun intended). Read reviews on 3 different sites, watched YouTube videos, and ultimately went with glockpistolswitch.com because of the price and shipping speed. Not disappointed. Product is exactly as described, shipping was fast, and the packaging was completely discreet. Already eyeing a few more items in their Handguns section.
Dave M. (verified owner) –
This is a solid piece of kit. Highly recommend.
Lisa H. (verified owner) –
I keep coming back because the prices are fair and shipping is always faster than expected. Good customer experience all around.