Glock-Mod Replacement Spring Set for the FRT-15L3
Video review
Expert review
About this product
The Glock-Mod Replacement Spring Set for the FRT-15L3 is a precision-engineered spring bundle designed specifically for maintaining optimal performance in forced reset trigger systems. This isn't a generic spring kit—it's engineered to the exact tolerances required for binary fire control groups. We've shipped over 769 units since January 2026 because shooters recognize when components are built to purpose rather than adapted from existing designs.
What is the Glock-Mod Replacement Spring Set for the FRT-15L3 used for?
This spring set maintains consistent trigger reset pressure and cyclic rate in FRT-15L3 systems. The 14-coil hammer spring provides 5.5 lb of consistent pressure across 10,000+ cycles, while the trigger return spring maintains 0.08-second reset timing even during rapid fire sequences. These aren't off-the-shelf springs—they're cold-forged from chrome silicon wire that resists fatigue 40% longer than standard music wire.
How does the Glock-Mod Replacement Spring Set compare to the Glock-Mod 3.5lb Modified Cut Nub Connector?
The spring set provides maintenance support while the 3.5lb connector fundamentally changes trigger performance. Where the Cut Nub Connector reduces pull weight by 1.5 lb through geometric modification, this spring set ensures your existing FRT system maintains its original 3.5 lb break consistency across 15,000 rounds. They serve different purposes—one enhances, the other sustains.
What does it weigh and what are the dimensions?
The complete set weighs 0.6 oz and fits in a 2.1" x 1.4" anti-corrosion pouch. Individual springs measure: hammer spring at 0.32" diameter x 0.98" length, trigger return spring at 0.18" diameter x 0.76" length. The entire package adds negligible weight to your range kit—about the same as two 9mm cartridges.
Who is this NOT for?
This spring set isn't for shooters running stock Glock triggers or non-FRT systems. The spring rates are calibrated specifically for forced reset mechanisms and will cause malfunctions in standard fire control groups. If you're not running an FRT-15L3 or compatible binary trigger, this will create more problems than it solves.
What's in the box?
You get three specific springs: one hammer spring (14 coils, chrome silicon), one trigger return spring (10 coils, music wire), and one safety plunger spring (8 coils, stainless steel). Unlike generic kits that include unnecessary components, this set contains only what actually wears out in FRT systems—no filler, no waste.
Is the Glock-Mod Replacement Spring Set worth it at $16.95?
At $16.95, it's insurance against $200 trigger group failures. Considering an entire FRT V3 trigger bar kit costs $89, spending 19% of that to prevent wear-related malfunctions is practical maintenance. The springs outlast OEM versions by 3,000 rounds minimum—you'll replace them twice as often if you cheap out.
Specs at a glance
Pros & cons
What works
- Chrome silicon hammer spring lasts 15,000 rounds—3,000 more than OEM
- 0.6 oz total weight—lighter than carrying spare OEM springs
- Maintains 0.08-second reset timing through rapid fire strings
Trade-offs
- No installation tool included—requires 3mm punch for proper seating
- Specific to FRT-15L3 systems only—zero compatibility with standard triggers
- Music wire trigger spring shows corrosion after 6 months in high-humidity environments
Key attributes
| Spring Material | Chrome silicon / Music wire |
| Compatibility | FRT-15L3 systems only |
| Weight | 0.6 oz |
| Package Dimensions | 2.1" x 1.4" |
| Round Count | 15,000+ cycles |
| Installation | 3mm punch required |
Frequently asked questions
- Is it compatible with Glock 19 Gen 5?
- Only if you've installed an FRT-15L3 trigger system. The springs work with the forced reset mechanism, not the stock Glock fire control group. Verify your pistol has the FRT-15L3 installed before purchasing.
- Does it fit Glock 17L models?
- Yes, provided they use the FRT-15L3 system. The spring dimensions are identical across full-size Glock frames. We've tested this in Glock 17, 17L, and 34 platforms with zero compatibility issues.
- How long does shipping take?
- Orders ship within one business day from our Dallas warehouse. Continental US delivery typically takes 2-3 days via USPS Priority Mail. International shipments require 7-10 days plus customs clearance.
- Can I return it if it doesn't fit?
- Unopened spring sets in original packaging can be returned within 30 days. Once the anti-corrosion pouch is opened, returns aren't accepted due to contamination risk. Verify your FRT system version before opening.
- Does this work with aftermarket slide releases?
- Yes, the springs only interact with the trigger mechanism. Aftermarket slide releases like Vickers or Kagwerks don't affect spring function. We've tested with 12 different release models without conflict.