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

  • Custom Lighter Striker Block Spring
  • Custom Lighter Sear Spring
  • Custom Lighter Striker 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

Reduce your S&W Shield Trigger Pull from a Stock 5.5 lbs to a Modified 2.5 lbs.  Smith and Wesson Shield Trigger Spring Kit will give your trigger a smoother, lighter, more crisp feel to your trigger pull. Best S&W Shield Trigger Upgrade to reduce your Trigger Pull by 55%  

  • Works for S&W M&P 1.0 & 2.0 Shield Models chambered in 9mm, .357,  40 cal and .45 caliber pistols

We highly recommend doing the polishing of all the internal components with this Firearm Polishing Kit.

Best Smith and Wesson Shield Trigger Job Available!  Custom Smith & Wesson Shield Upgrades for a Smoother and Lighter S&W Shield Trigger!  Check out the Installation video for Step by Step instructions on How to Polish S&W Shield Trigger! 

A must have Smith and Wesson Shield Accessories for all S&W M&P Shield 1.0 & 2.0 Pistols!  Custom Smith and Wesson Shield Trigger for all Smith and Wesson M&P Shield 9mm Accessories.  Also works for Smith and Wesson M&P Shield 40 Accessories.

The S&W Shield Extra Power Trigger Return Spring is 28% more powerful than stock which seems unnatural but it helps to reduce the felt trigger pull due to the design of the internal trigger mechanism and simultaneously provides increased tension that gives extra strength for a faster trigger reset.

S&W M&P Shield Trigger Kit will give your trigger a smoother, lighter, more crisp feel to your trigger pull. Our springs are American Made with the Finest American Spring Steel for quality that will last!  M*CARBO specializes in Smith and Wesson Shield Aftermarket Parts!

 Smooth S&W Shield Trigger Action and Superior Performance!  Works for all Smith and Wesson M&P Shield 1.0 & 2.0 Models chambered in 9mm | .357 | .40 cal | .45 ACP.

Ultimate Aftermarket S&W Shield Trigger Upgrade for Available S&W Shield Trigger Kits! Watch the Step by Step S&W M&P Shield Trigger Spring Install of S&W Shield Trigger Mods and see How to Polish the S&W Shield Trigger! 

Best Custom Smith and Wesson Shield Trigger Job for a Complete Match Trigger!

Custom Smith and Wesson Shield Trigger Job includes accurately calibrated spring weights deliver consistent force through the entire compression and release cycle to give you a light, refined trigger pull without sacrificing the reliability of your pistol s Safe Action system. S&W Shield Trigger Return Spring has nearly 30% more power than factory spring, which actually reduces pull by as much as 1 lb. for improved control. This produces faster trigger reset for quicker follow up shots. 

Smith and Wesson M&P Shield Owners Manual & Exploded View:

If your getting the Smith and Wesson M&P Shield Trigger Spring Kit, then you might find the following M&P Shield Resources useful in further enhancing your firearm. Download the Smith and Wesson M&P Shield Owners Manual or use the Exploded View of the M&P Shield Parts Diagram to plan your next firearm project.

M*CARBO No Hassle 100% Lifetime Guarantee:

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

Drop Tested and Approved:
Smith and Wesson M&P Shield 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 Shield 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 Shield 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 69 Reviews:
Chandler, AZ

Add On

Just wanted to add to me original review (TBeezy 06/08/2020). I was able to replace Striker Safety Spring when I replaced my sights (had to take to a gunsmith to remove the rear sight). Probably put 200+ rounds since my review and no hiccups whatsoever. Love it love it!! Great product!!


Nice kit

Kit works as advertised. Went from a 6 1/2 pound pull to a very crisp 4 witch for a carry gun is very good. The cost of this kit and the polishing work pays off and still cheaper than the performance center cost and actually feels alot smoother and crisper then paying more money. Plus you’ll feel better about doing the work yourself.



First attempt at any gun modification. Having a Massachusetts trigger means anything is an improvement.The first trip to the range was with a friend who had a big name kit installed in his identical gun. We ran a few mags thru both and found no noticable difference. I'm certain that after a few hundred rounds mine will feel even better. This definitely didn't give me a 2.5 lb. trigger, it did however give me a much smoother and enjoyable trigger..

Atlanta, GA

S&W Shield Trigger Kit

I have purchased many various kits from M CARBO.
My comments on the S&W Shield Trigger Kit.
Initial trigger pull 5lbs 6oz.
Cleaned and polished relevant parts per Chris's excellent video on the weapon.
Fitted the M CARBO trigger upgrade parts.
Final trigger pull 2lbs 12oz.
Very pleased. Excellent product once again by M CARBO.

Additional comments.
In the video' Chris advised putting the synthetic grease w/PTFE
all over the mechanism and various parts. In my humble opinion this is a mistake. After following this advice on a few of the various trigger mod kits from M CARBO i had to go back in and remove the grease and coat with CLP. Without doing so I could not achieve trigger pull as advertised.
Point in question, i followed the video and trigger pull was 4lbs 1oz. I cleaned away the grease and applied CLP and got 2lbs 12oz. This is not meant as a criticism, rather my experience on the builds so far.
I ran a profilometer over the polished parts and was pleased with the RMS values obtained.
If FLITZ is in short supply i have used Blue Magic which is a metal polish cream available from auto stores with exactly the same results. It also leaves a protective coating on the parts.
Hope this helps someone

Best in the business

Installed Shield trigger spring kit with lots or care,followed the excellent video that made things real easy. Results were perfect my pistol had a 9lbs. sloppy spounge for a trigger. Now trigger is 4 1/2 lbs with a sharp clean brake that is perfect for carry pistol.Thanks to Mcarbo for your service and for job well done.

Number of questions: 0