Polymer80 PF940SC Jig Kit for PF940SC Frame Blanks - polymer 80
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About this product
What is the Polymer80 PF940SC Jig Kit for PF940SC Frame Blanks? The Polymer80 PF940SC Jig Kit is a precision tooling set specifically designed to guide the machining of PF940SC polymer frame blanks into functional firearm receivers. This kit contains all drilling and milling fixtures needed to complete a compact G26-sized frame in approximately 2-3 hours of shop time. ModFuze has temporarily suspended production of these kits due to changing regulatory landscapes.
What is the Polymer80 PF940SC Jig Kit used for?
The PF940SC Jig Kit guides the precise drilling and milling required to complete Polymer80's 80% frame blanks into functional firearm receivers. The jig maintains rail channel alignment within ±0.002 inches tolerance during the 4-hole drilling sequence. Proper jig alignment prevents rail binding issues that can cause slide malfunctions in completed builds.
How does the Polymer80 PF940SC Jig Kit compare to the Polymer80 LR-308 jig?
The PF940SC jig handles compact pistol frames while the Polymer80 LR-308 jig accommodates larger rifle platforms. The SC jig weighs 1.8 lbs compared to the LR-308's 3.2 lb weight requirement for stabilizing the larger frame. For pistol builds under 6 inches barrel length, the SC jig provides better rail stability during the milling process.
What does it weigh and what are the dimensions?
The complete jig kit weighs 1.8 pounds and measures 7.5 x 4.2 x 3.1 inches when assembled. The aluminum jig blocks account for 1.2 pounds of the total weight, providing stability during the 45-minute milling process. The compact dimensions accommodate standard vise jaws up to 4.5 inches wide.
Who is this NOT for?
This jig kit is not suitable for builders requiring rifle-platform compatibility or those unwilling to invest in proper tooling. The PF940SC-specific design cannot accommodate the larger dimensions of rifle frames like our .308 80% Lower. First-time builders should review drill bit selection guidelines before purchase.
What's in the box?
The kit contains 4 aluminum jig halves, 3 drill bit sizes (3mm, 4mm, 5mm), and 8 stainless steel guide pins. The package includes hardware for 3 separate frame completion operations: rail channel milling, pin hole drilling, and recoil spring channel modification. All components are packaged in anti-corrosion foam with a total part count of 19 pieces.
Is the Polymer80 PF940SC Jig Kit worth it at $50.99?
At $50.99, this jig represents fair value for builders completing multiple PF940SC frames. The precision-machined aluminum construction withstands approximately 15-20 frame completions before requiring replacement. For single-build projects, consider that the jig cost exceeds 40% of the frame blank's price.
Specs at a glance
Pros & cons
What works
- 1.8 lb total weight — 45% lighter than rifle jig kits
- ±0.002 inch rail alignment tolerance — prevents slide binding
- 19-piece kit includes all drilling and alignment components
- Aluminum construction withstands 15-20 frame completions
Trade-offs
- No milling template included — adds $25-35 to total cost
- Compact-frame only — incompatible with full-size PF940V2
- Requires separate vise purchase — minimum 4 inch jaw width needed
- Limited to Gen3 Glock 26 compatibility — no Gen4/5 support
Key attributes
| Frame Compatibility | PF940SC compact |
| Slide Compatibility | Glock 26 Gen3 |
| Jig Material | 6061 aluminum |
| Weight | 1.8 lb |
| Dimensions | 7.5 x 4.2 x 3.1 in |
| Drill Bit Sizes | 3mm, 4mm, 5mm |
| Part Count | 19 pieces |
| Expected Completions | 15-20 frames |
Best for
- firearm building
- DIY firearm construction
Frequently asked questions
- Is it compatible with Glock 26 slides?
- Yes, the PF940SC jig produces frames compatible with Gen3 Glock 26 slides and components. The rail spacing maintains the standard 0.860 inch center-to-center distance. Finished frames accept all OEM Glock 26 internals without modification.
- Does this work with Polymer80 PF940V2 frames?
- No, the PF940SC jig is specifically dimensioned for compact frames only. The full-size PF940V2 requires different jig spacing for its longer 7.3 inch frame length. Attempting to use this jig on incompatible frames will misalign pin holes by approximately 0.5 inches.
- How long does shipping take?
- ModFuze ships jig kits within 3 business days via USPS Priority Mail. Most continental US deliveries arrive within 5-7 business days from order date. International shipments to compliant countries require additional 10-15 day transit time.
- Can I return it if the jig is damaged?
- ModFuze accepts returns of undrilled jigs within 14 days of delivery. Jigs showing drill marks or milling evidence are non-returnable due to ATF regulations. Damaged during shipping claims must be filed within 48 hours of receipt with carrier documentation.
- Does this include the router template?
- No, the PF940SC jig kit requires separate purchase of Polymer80's rail milling template. The template part number JIG-TEMP-SC must be acquired separately for the rail channel cutting operation. ModFuze recommends using a 1/4 inch end mill for this procedure.