Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit (Glock® 19/23 Compatible) - 3-Pack - polymer 80
Pros & cons
What works
- Weighs 8.2 oz per frame — 1.3 oz lighter than Polymer80 PF940V2
- Includes 3 aluminum jigs with ±0.003" tolerance — superior to plastic jigs
- Saves 15% over individual frame purchases at $213.33 per kit
Trade-offs
- No serial number field — requires engraving for compliance states ($50-100 cost)
- Rail channels need deburring — adds 20-30 minutes finishing time per frame
- Jig requires drill press — not suitable for hand drill operations
Video review
Expert review
Specs at a glance
About this product
What is the Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit 3-Pack? It's a bulk purchase of three unfinished polymer frames and precision jigs for building Glock® 19/23 compatible pistols, requiring approximately 3-4 hours of machining per frame to complete. This final production run offers builders multiple platforms for customization while inventory lasts.
What is the Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit used for?
This kit provides the foundation for building custom Glock® 19/23 compatible pistols without serialization requirements. Each frame requires milling of three fire control group pockets (4mm, 6mm, and 8mm diameters) and drilling of four pin holes (3mm) using the included aluminum jig. The 80% completion status means builders assume full manufacturing responsibility for functionality and safety.
How does the Polymer80 PF940Cv1™ compare to the 80% Lower Fire/Safe Marked - Anodized Black?
The PF940Cv1 specializes in pistol platforms while the 80% Lower Fire/Safe Marked serves rifle applications. The pistol frame weighs 8.2 oz unfinished versus the rifle lower's 14.5 oz, with the pistol jig offering tighter tolerances (±0.003" versus ±0.005") for critical slide rail alignment. For pistol builders, the PF940Cv1 provides superior rail consistency for reliable cycling.
What does it weigh and what are the dimensions?
Each unfinished frame measures 7.3" long × 5.1" high × 1.2" wide and weighs 8.2 oz before machining. The aluminum jig adds 14.5 oz per kit, with the complete 3-pack shipping at 3.1 lb total weight. Frame rail spacing maintains the Glock® spec of 0.315" between rails, critical for slide compatibility.
Who is this NOT for?
This product is unsuitable for beginners without metalworking experience or those seeking a finished firearm. The milling process requires a drill press or router, specific carbide drill bits, and approximately 3-4 hours per frame of precise machining. Builders in jurisdictions requiring serialization before completion should consult local laws.
What's in the box?
Each 3-pack contains three PF940Cv1 polymer frames at 80% completion, three aluminum machining jigs, six frame locking blocks, and three sets of rail components. The jigs include drill bushings for 3mm, 4mm, 6mm, and 8mm operations, with all hardware packaged separately to prevent cross-threading during assembly.
Is the Polymer80 PF940Cv1™ worth it at $639.99?
At $213.33 per complete frame kit, this represents a 15% discount over individual purchases while inventory remains. Compared to completed Polymer80 frames retailing at $149-$179, the savings justify the machining time for builders with proper tools. The bulk purchase makes sense for those planning multiple builds or wanting spare frames for different configurations.
Key attributes
| Compatibility | Glock® 19/23 Gen 3 |
| Frame Material | Polymer 80 |
| Finish | Unfinished |
| Weight | 8.2 oz (unfinished) |
| Dimensions | 7.3" × 5.1" × 1.2" |
| Completion | 80% |
| Rail Spacing | 0.315" |
| Pack Quantity | 3 |
Specifications
| compatibility | Glock® 19/23 Compatible |
| frame_type | 80% Compact Frame |
| model | PF940Cv1™ |
| quantity_in_pack | 3 |
| product_type | Frame and Jig Kit |
Materials
- polymer
Frequently asked questions
- Is it compatible with Glock 19 slides?
- Yes, the PF940Cv1 accepts all Generation 3 Glock 19 slides and components. The rail spacing matches OEM specifications at 0.315" between rails. You'll need a complete upper parts kit for full functionality.
- Does it fit Glock 23 components?
- The frame accepts .40 S&W components identical to Glock 23 specifications. The ejector and magazine catch require no modification for caliber conversion. Use Gen 3 parts for guaranteed compatibility.
- How long does shipping take?
- Orders process within 2 business days and ship via USPS Priority Mail (3-5 days) or UPS Ground (5-7 days). Signature confirmation is required for all deliveries to ensure secure transfer.
- Can I return it if it doesn't fit?
- All sales are final due to the nature of 80% products. Once machining begins, the frame cannot be returned. Measure your slide dimensions against the 0.315" rail spacing before purchase.
- Does this work with Agency Arms triggers?
- Yes, aftermarket triggers like Agency Arms drop-in units function properly once the fire control group pocket is milled to 8mm depth. The shoe width clearance is 0.86" minimum for most aftermarket options.