M*CARBO
M*CARBO S&W M&P FPC Trigger Spring Kit
Hammer, sear, and firing-pin spring set that drops the 9mm FPC's pull weight roughly 40%, the cheapest meaningful FPC upgrade.
Quick Specs
- Price
- $20
- Weight
- N/A
- Brand
- M*CARBO
- Category
- trigger
Features
- •Fits S&W M&P FPC 9mm (not the FPC .22LR)
- •Reduces pull weight approximately 40%
- •Stock ~3.7 lb down to ~2.25 lb
- •Hammer, sear, and firing-pin springs
Compatibility Tags
Overview
For $19.95 this is the highest-value upgrade on the FPC. The kit swaps the factory hammer, sear, and firing-pin springs for a tuned set that reduces trigger pull weight by roughly 40%, taking a stock pull of about 3.7 pounds down to around 2.25 pounds. The lighter pull cleans up the break without the reliability problems a too-light spring can cause, because M*CARBO tunes the set specifically for the FPC's blowback fire control. Installation takes basic hand tools and no permanent modification. One hard limit: M*CARBO lists this kit for the 9mm FPC only and explicitly not for the FPC .22LR, whose rimfire fire control needs full hammer energy for reliable ignition. Pair it with M*CARBO's FPC flat trigger for a complete feel-and-weight trigger job.
Key Features
- Reduces trigger pull weight approximately 40%
- Tuned hammer, sear, and firing-pin springs
- Stock ~3.7 lb pull down to roughly 2.25 lb
- Cheapest meaningful FPC upgrade at $19.95
- Fits the 9mm FPC, not the FPC .22LR
Pros
- +Biggest felt improvement per dollar on the FPC
- +Meaningful pull-weight reduction without reliability loss
- +Installs with basic hand tools, no gunsmithing
Cons
- −9mm FPC only, explicitly not the FPC .22LR
- −Reduces pull weight but does not change trigger shape
- −Requires disassembly of the fire control to install
Detailed Specifications
- platform
- S&W M&P FPC 9mm (not .22LR)
- partType
- Trigger spring kit (hammer, sear, firing pin)
- pullReduction
- Approximately 30%
- resultingPull
- Roughly 2.25 lb from a ~3.7 lb stock pull
- madeIn
- USA
Compatible Platforms
Similar Products
Related Guides & Articles
Guides
Build Your Custom Configuration
Add the M*CARBO S&W M&P FPC Trigger Spring Kit to your build and see how it enhances your platform.