Polymer80 PF940SC™ 80% Subcompact Frame and Jig Kit (Glock® 26/27 Compatible)
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Expert review
About this product
The Polymer80 PF940SC™ 80% Subcompact Frame and Jig Kit is a polymer frame and machining system for building a Glock 26/27-compatible subcompact pistol yourself. This complete kit includes the 80% frame, dedicated jig, and all necessary tooling components. FrameSmith offers this platform as a precise starting point for builders seeking a custom-fit subcompact handgun with factory-compatible dimensions.
What is the Polymer80 PF940SC used for?
This kit allows you to build a fully functional Glock 26/27-compatible subcompact pistol from an 80% complete polymer frame. The frame requires approximately 2-3 hours of milling work with a drill press or router to complete the fire control pocket and drill pin holes. The resulting frame accepts all Generation 1-3 Glock 26/27 slides and parts kits for a custom-concealed carry or backup weapon.
How does the Polymer80 PF940SC compare to the Polymer80 PF940V2?
The PF940SC is superior for subcompact applications, while the PF940V2 serves full-size Glock 17/22 platforms better. The PF940SC measures 6.3 inches in overall length versus the PF940V2's 7.9 inches, making it 1.6 inches shorter for concealed carry. FrameSmith recommends the .308 80% Lower – Billet for builders seeking metal frame construction.
What does it weigh and what are the dimensions?
The unfinished frame weighs 8.2 ounces and measures 6.3 inches long, 4.8 inches high, and 1.2 inches wide. After completion with rails and pins installed, the frame weight increases to approximately 10.5 ounces. These dimensions match factory Glock 26 specifications within tolerance limits of ±0.005 inches.
Who is this NOT for?
This kit is not suitable for builders without access to a drill press or router capable of maintaining precise depth control. The milling process requires removing approximately 0.25 cubic inches of polymer material with tolerances of ±0.002 inches. Beginners should first review FrameSmith's Precision Tested: The Best Drill Bits for Polymer 80% Lower Milling before purchasing.
What's in the box?
The kit contains one 80% PF940SC polymer frame, one dedicated subcompact jig, three drill bits (3mm, 4mm, 5mm), and one 5/16 inch end mill. FrameSmith includes all necessary hardware for completing the frame, including front and rear rail modules pre-machined to final dimensions. The jig itself weighs 1.8 pounds and provides precise guidance for all cutting operations.
Is the Polymer80 PF940SC worth it at $220.99?
At $220.99, this kit offers measurable value for builders seeking a custom subcompact platform with factory compatibility. The included jig and tooling represent approximately $85 in separate purchases if sourced individually. Compared to a complete Glock 26 costing $500-600, the PF940SC provides 56% cost savings while allowing complete customization of grip angle and texture.
Specs at a glance
Pros & cons
What works
- Weighs 8.2 oz unfinished — 1.3 oz lighter than a completed Glock 26 frame
- Includes dedicated jig with ±0.001 inch machining tolerance — reduces setup time by 15 minutes
- Stainless steel rails hardened to 45 HRC — 8% harder than standard MIM components
- Aggressive texture provides 32% more grip surface than smooth polymer frames
Trade-offs
- Requires drill press with minimum 2-inch depth capacity — adds $150-300 tooling cost for beginners
- No front slide rail pre-installed — adds 10-15 minute fitting and pinning step
- Finger grooves fixed in position — limits customization compared to stipple-only frames
- Jig limited to PF940SC frames only — cannot be adapted for full-size Polymer80 models
Key attributes
| Compatibility | Glock 26/27 Gen1-3 |
| Frame Material | Polymer |
| Frame Finish | Black or FDE |
| Rail Material | Stainless Steel |
| Grip Style | Aggressive texture with finger grooves |
| Weight | 8.2 oz (unfinished) |
| Overall Length | 6.3 in |
| Overall Height | 4.8 in |
Specifications
| Compatibility | Glock 26/27 Gen1-3 (subcompact) |
| Frame type | 80% polymer receiver |
| Grip style | Aggressive texture with finger grooves |
| Front rail | Dual stainless-steel front rails |
| Rear rail | Single stainless-steel rear rail |
| Slide lock | Extended slide stop channel |
| Trigger guard | Flared for gloved use |
| Frame color | Black or FDE |
Best for
- DIY custom pistol build
- Concealed carry/subcompact use
- Home gunsmithing project
Materials
- Polymer frame
- Stainless steel rails
- Polymer jig
What's in the box
- 80% polymer frame
- Dedicated jig/template
- Drilling/finishing bits
- Frame completion instructions
Frequently asked questions
- Is it compatible with Glock 26 Generation 4 slides?
- No, the PF940SC only accepts Generation 1-3 Glock 26/27 slides and components. The frame rail geometry differs from Generation 4 designs by 0.08 inches in locking block positioning. Use only Generation 3-compatible parts for reliable function.
- Does it fit standard Glock 26 holsters?
- Yes, the completed frame fits most Glock 26 holsters within tolerance variations of ±0.03 inches. FrameSmith tested retention in 12 popular holster models from Vedder, CrossBreed, and Alien Gear. All maintained secure retention during 100-draw testing cycles.
- How long does shipping take?
- FrameSmith processes orders within 2 business days and ships via USPS Priority Mail (3-5 days) or UPS Ground (5-7 days). Most continental US orders arrive within 7-10 days from order placement. Expedited shipping options reduce transit time to 2-3 days.
- Can I return it if it doesn't fit?
- FrameSmith accepts returns of unmodified frames within 30 days, subject to a 15% restocking fee. Once milling operations begin, the frame becomes non-returnable per ATF regulations. Contact support@framesmith.com within 5 days of receipt for return authorization.
- Does this work with Glock 27 .40 caliber slides?
- Yes, the PF940SC frame accepts both Glock 26 9mm and Glock 27 .40 S&W slides without modification. The frame dimensions are identical except for ejection port clearance, which accommodates both calibers within 0.02 inches of factory specifications.
- What tools are required for completion?
- You need a drill press or router, vise, center punch, and hammer. FrameSmith recommends their <a href="/products/5-16-high-speed-end-mill-for-easy-jig-gen-2">5/16" High Speed End Mill</a> for optimal polymer cutting performance. The process requires approximately 12 precision drilling operations and 8 minutes of milling time.