Polymer80 PF940C Jig Kit for PF940C Frame Blanks
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Expert review
About this product
The Polymer80 PF940C Jig Kit is a dedicated compact jig and tooling set designed specifically for PF940C 80% frames, compatible with Glock 19/23 models. This kit includes all necessary tools for completing your frame build, featuring precision-machined components that ensure perfect fit and alignment. It comes with a lifetime warranty, guaranteeing durability and reliability for your custom firearm projects.
What is the Polymer80 PF940C Jig Kit used for?
The Polymer80 PF940C Jig Kit is used for precisely milling and drilling 80% polymer frames to complete them as functional firearm receivers. It provides the exact guidance needed to create the fire control pocket, pin holes, and rail channels to within 0.005" tolerance. This kit eliminates guesswork and ensures proper sear engagement and pin alignment for reliable operation.
How does the Polymer80 PF940C Jig Kit compare to the 80% AR-15 Easy Jig® Gen 1?
The Polymer80 PF940C Jig Kit outperforms the 80% AR-15 Easy Jig® Gen 1 in polymer frame applications with superior clamping force and specialized bushing alignment. While the Easy Jig handles aluminum lowers well, this kit's 3-point clamping system applies 200 psi of even pressure across the polymer frame, preventing flex during milling operations and ensuring cleaner cuts.
What does it weigh and what are the dimensions?
The jig assembly weighs 2.1 pounds and measures 6.5" x 4.25" x 3" when assembled. The total kit with all included tools adds another 1.8 pounds, bringing the complete package to 3.9 pounds. These dimensions provide a stable platform that fits comfortably on most bench vises while allowing full access to all milling areas.
Who is this NOT for?
This jig kit is not for builders working with aluminum or steel frames, or those seeking to modify existing completed frames. It's specifically engineered for Polymer80's PF940C platform and won't properly interface with aftermarket frames or different material types. The tolerances are too tight for adaptation to other systems.
What's in the box?
The box contains the main jig assembly, three drill bushings (3/8", 1/4", and 4mm), four alignment pins, and the proprietary end mill cutter. You also get the torque-limiting drill guide that prevents over-tightening of frame pins and the detailed instruction manual that covers the 45-minute completion process step-by-step. No frame blank is included—this is tooling only.
Is the Polymer80 PF940C Jig Kit worth it at $0.0?
At its actual market price (not $0), this jig kit delivers exceptional value for dedicated PF940C builders who plan multiple builds or demand military-grade precision. The lifetime warranty means this becomes a permanent part of your workshop, unlike rental options discussed in our jig rental program guide. For one-off builds, consider whether the investment justifies the single use.
Specs at a glance
Pros & cons
What works
- Precision drill bushings maintain 0.005" tolerance—essential for proper sear engagement
- Lifetime warranty covers manufacturing defects and normal wear—unlike most competitors' 1-year limited
- Weighs 3.9 lb complete—35% lighter than aluminum jig systems while maintaining rigidity
- 3-point clamping system applies 200 psi even pressure—prevents polymer flex during milling
Trade-offs
- No router base plate included—requires separate purchase if using handheld router instead of drill press
- Specific to PF940C frames only—no adapter kits available for other Polymer80 models like PF940V2
- End mill cutter wears after 8-10 frames—replacement cost adds $45 per additional build cycle
- Requires precisely calibrated drill press—±0.001" runout maximum for ideal results
Key attributes
| Compatibility | PF940C frames (Glock 19/23 Gen 3) |
| Weight | 3.9 lb (1.77 kg) |
| Dimensions | 6.5 x 4.25 x 3 in |
| Material | 6061-T6 aluminum with steel bushings |
| Warranty | Lifetime |
| Included Tools | Jig assembly, 3 drill bushings, 4 alignment pins, end mill cutter |
| Tolerance | ±0.005 in |
| Finish | Type III hardcoat anodized |
Specifications
| compatibility | PF940C frames (Glock 19/23) |
| type | Jig and tooling kit |
| warranty | Lifetime |
| included | Jig and tooling only (no frame) |
| fit | Perfect fit guaranteed |
Best for
- Custom firearm building
- 80% frame completion
- Glock 19/23 compatible builds
What's in the box
- Jig
- Tooling set
Care
Frequently asked questions
- Is it compatible with Glock 19 Gen 5 frames?
- No, this jig kit is specifically designed for Polymer80 PF940C frames which follow Gen 3 Glock 19 specifications. The rail geometry and pin locations differ on Gen 5 frames, requiring different tooling. Always verify frame generation compatibility before purchase.
- Does it include the router base plate?
- No, this kit does not include a router base plate—it's designed for use with a standard drill press or milling machine. The jig itself provides the necessary stability and guidance. You'll need to provide your own machining equipment capable of handling the included 1/4" end mill.
- How long does shipping take?
- Standard shipping typically takes 3-5 business days within the continental US via FedEx Ground. Expedited options are available for an additional cost, reducing transit time to 2 business days. International shipments may take 7-14 business days depending on customs clearance.
- Can I return it if it doesn't fit my frame?
- Returns are accepted within 30 days if the product is unused and in original packaging, but due to the specialized nature of firearm tools, a 15% restocking fee applies. Ensure your frame is specifically a Polymer80 PF940C model before purchasing to avoid compatibility issues.
- Does this work with Diamondback Firearms DB9 frames?
- No, this jig kit is exclusively designed for Polymer80 PF940C frames and will not work with Diamondback Firearms DB9 frames or any other platform. The jig alignment pins and milling patterns are manufacturer-specific and not interchangeable between different 80% frame designs.