• Reduce your factory 6.75lb Trigger Pull to a modified 3.75lb Trigger Pull! (Average results can vary up to +/- 1lb)
  • Ultimate Smith and Wesson M&P Trigger Upgrade!
  • Improve Smith and Wesson M&P Pistol accuracy and overall performance
  • 50% Trigger Pull Reduction!
  • Functions in S&W M&P Models chambered in 9mm / .357 / .40cal & .45ACP
  • Works for S&W M&P 1.0 & 2.0
  • Best Aftermarket Trigger for Smith and Wesson M&P Pistols!
  • Highest Quality American Spring Steel ASTM A228 Music Wire
  • Kit also includes Assembly Dowel
  • Protected by the M*CARBO 100% Lifetime Guarantee
  • Made in the USA!
  • Fast Same Day Shipping!

Smith and Wesson M&P Trigger Upgrade Kit 1.0 & 2.0 - 9mm | .357 | .40cal | .45 ACP

  • Custom Lighter Striker Spring
  • Custom Lighter Striker Block Spring
  • Custom Lighter Sear Spring
  • Custom Heavy Duty Trigger Return Spring ( Extra power reduces the felt trigger pull weight)
  • Includes Trigger Spring Installation Tool
  • 1,000 Grit Silicon Carbide Sandpaper
  • Synthetic Grease with PTFE
Smith and Wesson M and P Trigger Upgrade Kit {arts

Reduce your Smith and Wesson M&P Trigger Pull from a stock 6.75lbs to a modified 3.75lbs!  50% Trigger Pull Reduction!

Best Custom Smith and Wesson M&P Trigger Upgrade for a lighter and smoother trigger pull. Reduce your Smith and Wesson M&P Trigger Pull by 50%.  M*CARBO specializes in Smith and Wesson M&P 9mm Aftermarket Parts for Superior Performance!

Smith and Wesson M&P 9mm Trigger Kit & 40 Trigger Kit will improve accuracy and tighten up shot groups!  

**Works for the following calibers 9mm / .357 / .40cal & .45ACP.  Also works for the S&W M&P 1.0 & 2.0!**

Hands down the Best Smith and Wesson M&P Trigger Available and the Only One Made by Combat Veterans! Take your Smith and Wesson M&P to the Next Level of Competition Performance!  

The Best Smith and Wesson M&P 40 Upgrades for a Smoother Trigger Pull. Compatible Lighter Trigger Pull with Custom Smith and Wesson M&P 9mm Upgrades for the Factory M&P Trigger.

Smith and Wesson M&P Owners Manual:

If you're getting the Smith and Wesson M&P Trigger Spring Kit, then you might find the following Smith and Wesson M&P Resources useful in further enhancing your firearm for other Smith and Wesson M&P Accessories. Download the Smith and Wesson M&P Owners Manual.

M*CARBO No Hassle 100% Lifetime Guarantee:

The Smith and Wesson M&P Trigger Upgrade Kit is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

Drop Tested and Approved:
Smith and Wesson M&P Trigger Spring Kit includes M*CARBO ASTM Spec Springs that will offer a perfect trigger pull reduction with an unlimited drop test rating (3", 6", 9" & 12"+).

Range Tested and Approved:

The Smith and Wesson M&P Trigger Spring Kit has been tested repeatedly with numerous brands of ammunition to ensure reliable operation and safety.

Veteran Owned and Operated Business:

American made Smith and Wesson M&P Trigger Spring Kit designed and manufactured by Combat Veterans. We will donate a portion of your purchase to the Military Foundations we humbly support.


You must be 18 yrs of age to purchase. We advise that all parts purchased from our inventory be installed and inspected by a qualified gunsmith. Modifying your weapon may be prohibited in your state. Do not modify your sear or hammer engagement surfaces, with or without the Smith and Wesson M&P Trigger Spring Kit. Before installing please be sure to check all local state and federal laws. By installing this part you agree to take full responsibility for any and all legal, health and warranty consequences that may be incurred.

Overall Customer Rating of 94 Reviews:
New Mexico

M&P Trigger Kit

M&P 2.0 40 cal (manual Safety): Completed the upgrade. The only difference from the video was, the takedown lever was still installed in the locking block for disassembly and reassembly. it smoothed out the trigger pull and the trigger pull weight dropped from 6lbs to 4.75lbs. Highly recommend.


6lb pull to 3.5

My second kit installed on an m&p 2.0 with excellent results.

Blown away

Recently I bought a S&W spring kit and polishing kit to help the “squishy” trigger.

OMG. I took it shooting for the first time since the work and it’s impressive! The first shot totally surprised me, even knowing I did the work and tried dry firing a number of times, to try and see the difference. And what a difference there was! I liked shooting this M&P before, but now I love it! Great product and thanks for the instructional videos. It made all the difference in the world.

Great work


Excellent results! Sub 2 lbs with Apex Trigger/Sear

I just wrote an extensive review, but there was an error when I submitted it and it appears to have been lost. I will sum up my results, as I'm not redoing the entire thing. I started with a decent 4.5 lb pull on my 2.0 5" gun. I hated the hinged trigger so first ordered an Apex trigger with duty carry kit. Installing this improved the trigger, but it actually increased the pull to 5.5 lbs (this is by design for duty/carry kit). I reinstalled the stock trigger return spring and it dropped to 3.5 lbs. I wanted to see how far I could push it though, so ordered the MCarbo kit. Installing all the springs and polishing the internals resulted in an incredible sub 2 lb pull! If I had to do it over again, I would just get the Apex trigger (without the kit) and the MCarbo kit. I think this would result in an amazing trigger for well under $100.



Im from MA so my M&P had about a 20lb trigger (joking but not by much). I did mediocre polish job not nearly as intense as the dude on the video. Result were great. Like night and day. If you are too lazy to polish I'm willing to bet just swapping springs made the majority of the difference.

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