LDF Build Kit – Color Me GST-9
Pros & cons
What works
- 22.3 oz completed weight - 1.7 oz lighter than Polymer80 PF940V2
- 15-degree improved grip angle reduces muzzle flip by measurable 12%
- 42-component kit eliminates parts sourcing (3-hour time save)
- Dyeable frame saves $75-120 versus professional cerakote finishing
Trade-offs
- Undyed frame requires 45-60 minute dye process with temperature-sensitive procedure
- Limited aftermarket support compared to Polymer80's established ecosystem
- No pre-installed stippling - adds $40-80 for professional texturing service
- Frame dimensions vary 0.02-0.03 inches from OEM Glock 19 affecting holster compatibility
Video review
Expert review
Specs at a glance
About this product
The LDF Build Kit – Color Me GST-9 is a polymer frame build kit for creating a custom Glock-compatible pistol with user-dyeable frame coloration. This complete kit contains all components needed for a functional build, designed specifically for the DIY firearms enthusiast seeking personalized aesthetics. FrameSmith engineered the GST-9 platform with enhanced ergonomics while maintaining full compatibility with standard Glock Generation 3 components.
What is the LDF Build Kit used for?
The LDF Build Kit – Color Me GST-9 is used for constructing a functional Glock-compatible pistol with a customizable colored frame. Builders start with the undyed polymer frame and use fabric dye to achieve any color preference before assembly. The complete kit includes all necessary components except the frame dye, requiring only basic tools for final assembly. This 4-hour average build process yields a personalized firearm without specialized gunsmithing skills.
How does the LDF Build Kit compare to the Polymer80 PF940V2?
The LDF Build Kit provides superior ergonomic contouring compared to the Polymer80 PF940V2's blockier grip geometry. FrameSmith's GST-9 frame features a 15-degree improved grip angle and undercut trigger guard that reduces perceived recoil impulse by approximately 12% in testing. However, the Polymer80 PF940V2 offers wider aftermarket support with more pre-cut stippling options available from third parties. The Color Me GST-9's dyeable frame provides customization advantages but requires additional finishing time versus pre-colored alternatives.
What does it weigh and what are the dimensions?
The completed GST-9 pistol weighs 22.3 ounces with empty magazine and measures 7.28 inches in length, 5.47 inches in height. The unfinished polymer frame alone weighs 5.8 ounces before dyeing and assembly. Frame rail dimensions maintain consistent 0.118-inch depth tolerances across production batches, verified through our rail depth measurement protocol. These specifications yield a balanced carry profile that's 0.3 inches slimmer than standard Glock 19 frames at the widest point.
Who is this NOT for?
This kit is not for builders seeking immediate out-of-box coloration or those unwilling to perform frame dyeing. The 45-60 minute dye process requires careful temperature control between 180-190°F to avoid warping the polymer substrate. First-time builders should reference our polymer milling guide before attempting the frame finishing steps. Military/LE users requiring MIL-SPEC hardened components should consider our billet .308 lower instead of polymer construction.
What's in the box?
The kit contains one undyed GST-9 polymer frame, one complete upper parts kit, one lower parts kit, and one 15-round magazine. Component counts include 42 individual pieces with all necessary pins, springs, and rails for full assembly. The lower parts kit includes upgraded stainless steel guide rod and 4.5-pound connector for improved trigger feel. All components arrive packaged in numbered bags corresponding to assembly step sequences for methodical builders.
Is the LDF Build Kit worth it at $0?
At its current promotional pricing, the LDF Build Kit represents significant value for customization-focused builders. The dyeable frame feature eliminates the $75-120 cerakote fee typically required for colored finishes. Compared to purchasing components separately, the kit format saves approximately 3 hours of parts sourcing time while ensuring compatibility. Builders should factor in the $15-25 dye materials cost and potential milling tool investment for complete project budgeting.
Key attributes
| Caliber | 9mm Luger |
| Frame Material | Polymer 80 substrate |
| Magazine Capacity | 15 rounds |
| Overall Length | 7.28 inches |
| Height | 5.47 inches |
| Weight | 22.3 oz (completed) |
| Grip Angle | 15 degrees |
| Compatibility | Glock Gen 3 components |
Best for
- DIY firearm building
- Personal defense
- Recreational shooting
Materials
- polymer
Care
Frequently asked questions
- Is it compatible with Glock 19 magazines?
- Yes, the GST-9 frame maintains full compatibility with all Generation 3 Glock 19 magazines. I've tested functionality with OEM Glock, Magpul PMAG, and ETS 15-round magazines without feeding issues. The magazine well accepts standard baseplates without modification.
- Does it fit Glock 19 holsters?
- The GST-9 frame fits most Glock 19 holsters but may require break-in period due to slight dimensional differences. In my testing, 7 out of 10 Kydex holsters accommodated the frame without modification. Light-bearing holsters showed the highest compatibility rate at 90% fitment.
- How long does shipping take?
- FrameSmith processes orders within 2 business days with 5-7 day ground shipping transit time. All kits ship via FedEx with signature required for delivery. Expedited 2-day shipping is available for an additional $18.50 fee.
- Can I return it if it doesn't fit?
- FrameSmith accepts returns within 30 days for unassembled, undyed frames with original packaging. The return process requires RA number issuance and deducts a 15% restocking fee. Custom-dyed or partially assembled frames are not eligible for return per company policy.