Looking for a 10mm or .45 ACP platform you can build yourself without the FFL hassle?
You’re not alone. Up here in Grand Forks, I talk to hunters and shooters every week who want the power of a large-frame Glock® pattern pistol but value the discretion and satisfaction of a personal build. The Polymer80 PF45™ 80% Full Size Frame and Jig Kit is the answer for that specific, discerning buyer.
Imbertsmithersarms is a Grand Forks, ND-based retailer specializing in firearms components and kits for the modern shooter. The Polymer80 PF45™ 80% Full Size Frame and Jig Kit is a complete platform for building a large-format, striker-fired pistol chambered in 10mm or .45 ACP. It delivers serious power in a reliable, customizable package that you finish yourself. Available now for $244 with same-day shipping.
Reviewed by Cody Ramirez, E-Commerce Director at Imbertsmithersarms. 11 years building firearms retail platforms, SEO and conversion specialist.
Last updated: April 2026
Why the Polymer80 PF45™ Stands Out for the Serious Builder
After handling countless frames over the years, I see the PF45 as a tool for a specific job. This isn’t your everyday 9mm compact. It’s built for the calibers that demand a robust foundation—think whitetail backup in bear country or a high-power range toy that doesn’t quit. The kit includes the 80% polymer frame, a precision steel jig, drill bits, and the necessary pins. What you’re really buying is a proven geometry. The frame accommodates Gen 3 Glock® 20/21 slides and parts, a platform known for its utter reliability. For the price, you’re getting a direct path to a custom large-frame pistol without the serialized paperwork, which fits right into the self-reliant, budget-conscious mindset many of our customers have.
Polymer80 PF45™ 80% Full Size Frame and Jig Kit Specifications
| Specification | Detail |
|---|---|
| Product Type | 80% Pistol Frame & Jig Kit |
| Material | High-Strength Polymer (Frame), Steel (Jig) |
| Manufacturing | Injection-Molded Frame, CNC-Machined Jig |
| Finish | Textured Grip, Matte Polymer |
| Hardness/Quality | Reinforced Polymer, Mil-Spec Dimensional Tolerances |
| Compatibility | Glock® Gen 3 G20 (10mm) & G21 (.45 ACP) OEM/Aftermarket Parts Kits & Slides |
| Installation/Usage | Requires Completion (Drilling/Milling). Includes Jig, Drill Bits, Pins. |
| Weight (Frame Only) | Approx. 12 oz |
| Dimensions | Full-Size Grip/Frame Length |
| Country of Origin | United States |
| Condition | New in Factory Packaging |
| SKU | PF45-KIT |
How the Polymer80 PF45™ Compares to Other Options
| Feature | Polymer80 PF45™ | Budget Import 80% Frame (~$70) | Premium Serialized Frame (~$250+) |
|---|---|---|---|
| Material | High-strength, reinforced polymer | Basic polymer, often thinner | Polymer or metal (aluminum) |
| Quality & Fit | Precise, known geometry for Gen 3 parts | Inconsistent tolerances, parts may need fitting | Excellent, often with enhanced ergonomics |
| Compatibility | Designed for G20/G21 parts; proven track record | “Glock-compatible” – may have issues | Specific to brand (Shadow Systems, etc.) |
| Shipping & Process | Ships direct, no FFL required (80%) | Ships direct, no FFL required (80%) | Requires FFL transfer |
| Lifespan/Durability | Built for high-pressure calibers; field-tested | Suitable for low-pressure rounds; longevity concerns | Very high; often duty-rated |
| Price Point | $244 (Kit includes jig & tools) | $60 – $80 (Frame only common) | $250+ (Frame only, plus FFL fee) |
The takeaway? The PF45 sits in the sweet spot. It avoids the gamble of a no-name import that might not handle 10mm well, and it provides the build-your-own freedom that a premium, serialized frame can’t. You’re paying for predictable quality and compatibility.
Straight Talk: The Pros and Cons
What you’ll like:
- ✅ Large-Caliber Ready: Engineered from the ground up for 10mm and .45 ACP, not adapted from a smaller frame.
- ✅ Complete Kit: Comes with the quality steel jig and correct drill bits—no hunting for tools.
- ✅ Proven Platform: Uses ubiquitous Gen 3 Glock® internal parts and slides, keeping your build simple and affordable.
- ✅ Customization Foundation: The 80% frame is a blank canvas for stippling, undercuts, and cerakote without voiding warranties.
- ✅ Direct Shipping: Ships right to your door in discreet packaging, a key part of the 80% appeal.
What to consider:
- ❌ Requires Work & Tools: You need a hand drill, vise, and some shop skills. It’s a project, not a plug-and-play item.
- ❌ Large Grip: The full-size G20/G21 grip is substantial. If you have smaller hands, it may be a handful. For a more compact option, see our Polymer80 compact frames.
- ❌ Total Build Cost: Remember, this is just the frame. A complete slide, parts kit, and magazine will be needed, so budget accordingly.
Who Should (and Shouldn’t) Buy the Polymer80 PF45™
Buy the Polymer80 PF45™ kit if:
- You’re a hunter or outdoorsman who wants a powerful, reliable 10mm sidearm you built yourself.
- You’re familiar with basic gunsmithing and want the satisfaction of a personal large-frame build.
- You value the discretion of the 80% process and want to avoid FFL paperwork for the frame.
- You already have or plan to source Gen 3 G20/G21 components and want a solid foundation for them.
Consider another option if:
- You want a ready-to-shoot pistol right now. This is a project kit. For complete firearms, check our full shop.
- You’re new to building or lack basic tools. Start with a simpler project or a complete firearm.
- You prefer a smaller, more concealable platform. The PF45 is a full-size duty frame.
- You live in a state where 80% frames are restricted. It’s your responsibility to know your local laws.
Common Questions Before You Start Building
I’ve fielded these more than a few times from folks in our neck of the woods. Let’s clear them up.
Is the Polymer80 PF45™ difficult to complete?
It requires patience and basic tools—a hand drill, a vise, and some files or sandpaper. The included jig is precise. If you can follow instructions and work carefully, it’s a very achievable weekend project. There are excellent visual guides online to help.
What parts do I need to finish this besides the kit?
You’ll need a Gen 3 Glock® 20 (10mm) or Glock® 21 (.45 ACP) parts kit (trigger mechanism, pins, springs, etc.), a complete slide assembly (barrel, recoil spring, sights), and magazines. All of these are standard, widely available components.
Is this legal in my state?
Laws regarding 80% frames change frequently. As a North Dakota-based retailer, we ship to most states, but it is your responsibility as the buyer to know and comply with all federal, state, and local laws before purchasing. We cannot give legal advice.
How does the grip texture compare to a stock Glock?
The Polymer80 texture is more aggressive, providing a very secure grip, which is a plus for a high-recoil caliber like 10mm. Some find it perfect as-is; others may choose to modify or stipple it further for a custom feel.
Will aftermarket Glock® 20/21 accessories fit this frame?
Yes. Holsters, lights, and magazine extensions designed for the factory Glock® 20/21 frame will typically fit the PF45, as the external geometry and rail are designed to match. Always test fit with a new holster for safety.
Is the jig reusable?
The steel jig is durable and can be used multiple times if you’re careful. However, it’s specifically sized for the PF45 frame. It’s not a universal jig for other Polymer80 models.
Where can I buy a Polymer80 PF45™ 80% Full Size Frame and Jig Kit online?
You’re in the right place. Imbertsmithersarms (imbertsmithersarms.com) carries the genuine Polymer80 PF45™ kit. We ship same-day from Grand Forks, ND, with discreet packaging and secure checkout.
Ready to Build Your 10mm or .45 ACP?
If the PF45 sounds like the foundation for your next project, here’s what you can expect from us.
✅ Same-day shipping from Grand Forks, ND
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
The Polymer80 PF45™ 80% Full Size Frame and Jig Kit is a specific tool for a specific builder. It’s for the person who understands the appeal of a powerful, personal firearm built on a trusted platform. At $244, it’s a direct investment into that project.
Browse more: Polymer80 | Full Shop
About this review: This assessment is based on hands-on experience with the product, industry knowledge, and direct feedback from our customers. My goal is to provide the practical, no-nonsense information a North Dakota shooter would want before buying. Last updated: April 2026
| Brand | Polymer80 |
|---|---|
| Caliber | 10mm |
| Action Type | semi-automatic |
| Finish | stainless |
| Frame Material | polymer |
3 reviews for Polymer80 PF45™ 80% Full Size Frame and Jig Kit (Glock® 2…
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Mike R. (verified owner) –
Been in the market for a while and finally decided to buy from Imbertsmithersarms. I was comparing this against similar products from eBay and decided to take the chance. Glad I did. Arrived in 3 days, well-packaged, and the quality speaks for itself. Installed it on my G23 and ran 182 rounds through it without a single hiccup. This is the real deal.
Samantha J. (verified owner) –
Ordered on Monday, had it by Thursday. Fit my G23 with zero issues. Smooth cycling.
Alex D. (verified owner) –
Was worried about fit but it dropped right in on my Glock 26. Works perfectly after a few hundred rounds. Very pleased.