Smith and Wesson SD9VE / SD40VE Trigger Spring Kit

  • Custom Lighter Striker Spring
  • Custom Lighter Trigger Return Spring
  • Custom Lighter Striker Block Spring
Smith and Wesson SD9VE SD40VE Trigger Spring Kit

The Smith and Wesson SD9VE Trigger Spring Kit is one of the Best Smith and Wesson SD9VE Accessories to improve your accuracy and tighten your shot groups. Also works for Smith and Wesson SD40VE Trigger. 

Upgrade the factory SD9VE Trigger with a Superior SD9VE Aftermarket Part designed for Competition Level Performance! One of the Best S&W SD9VE Accessories to improve the Smith and Wesson SD9VE reliability and performance with lighter, higher quality springs for a smoother and more consistent S&W SD9VE Trigger Pull! 

This is the best way to upgrade your SD9VE Trigger! M*CARBO specializes in American Made SD9VE Accessories for Superior Performance! Let us know if you have any ideas for New S&W SD9VE Upgrades at!  

Custom Smith and Wesson SD9VE Trigger Kit to Reduce your SD9VE Trigger Pull by 50% for the Ultimate Smith and Wesson SD9VE Trigger Job. Better than the simple spring steel Apex Trigger Kit SD9VE that wears out. Premium M*CARBO Custom S&W SD9VE Accessories for a Superior SD9VE Trigger Upgrade!

Superior Smith and Wesson SD9VE Upgrades for the Best SD9VE Trigger Upgrade! Custom SW SD9VE Accessories to Increase Performance and Improve Reliability. S&W SD9VE Upgrades for Superior Performance by Combat Veterans!

S&W SD9VE & SD40VE Owners Manual:

If you're getting the Smith and Wesson SD9VE / SD40VE Grips, then you might find the following Smith and Wesson SD9VE / SD40VE Resources useful in further enhancing your firearm for other Smith and Wesson SD9VE / SD40VE Accessories. Download the Smith and Wesson SD9VE / SD40VE Owners Manual.

M*CARBO No Hassle 100% Lifetime Guarantee:

The Smith and Wesson SD9VE/SD40VE Trigger Spring Kit is protected by the M*CARBO No Hassle 100% Lifetime Guarantee.

Drop Tested and Approved:

Smith and Wesson SD9VE / SD40VE Trigger Spring Kit is an M*CARBO ASTM Spec Spring 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 SD9VE / SD40VE 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 SD9VE / SD40VE Trigger Spring Kit is 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 SD9VE / SD40VE Trigger Upgrade. 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 222 Reviews:

SD9VE / SD40VE Trigger Spring Kit

After attempting to cut my trigger finger off (luckily it was saved), the almost 8lb trigger pull was to much for me to handle. I thought I was going to have to by another gun. Then I found this M*CARBO site and their trigger spring kit. I figured $20 is a whole lot cheaper than a new gun so I "pulled the trigger" and gave it a shot. Boy what a game changer. Thanks M*CARBO. You save my a trip to the dog house by not buying a new gun.


8lb down to 6.5

Great results! Very pleasing to see what a few bucks can do.

SD9VE trigger spring kit...AWESOME!!!!

I installed the MCARBO spring trigger kit along with a Galloway Precision Boudica trigger some weeks ago and due to business travel was not able to hit the range and check it out. Well, I hit the range on 5/14 and man what a DIFFERENCE!!!! No more super trigger weight, no more pulling off target, no more "when the heck is this gun gonna fire". Overall EXCELLENT product, easy to install and well worth the time, effort and money. Fab upgrade, HIGHLY RECOMMENDED!!!!

Southeastern USA

Awesome trigger pull reduction, but installation video problematic

Recently installed the trigger spring kit in my SD9VE. Swapping out the striker spring and striker safety block (firing pin safety) spring was a snap.

The trigger return spring, not so much. Trying to drive out the trigger/locking block pin from the right side of the frame using a punch and hammer is problematic because the slide release lever captures that pin. Trying to hammer it through from the right to left could cause damage to both parts. Instead, do it Glock-style and using a Glock tool or similar, push on the end of the pin from the left while wiggling the slide release lever forward and rearward. It'll come right out.

Re-installing the trigger/locking block pin by following the video tutorial was even more frustrating as the "installation tool" (slave pin) would not stay in place and I could not get the pin past the hole in the slide release lever. I had to consult the frame re-assembly video from Apex Tactical and following their tutorial had that pin back in in seconds. This involves removing the rear frame coil pin (careful! It may be larger on one end) and removing the sear block assembly. The rear of the trigger bar is then lifted up so that the "loop" on the front of the trigger return spring aligns itself with the holes in the trigger body. Push that trigger pin back in from the right, through the trigger, and then through the slide release lever as you're wiggling it (again, Glock-style) and it's easy. Hook the sear block back onto the trigger bar, push it all inside the frame, and drive the rear frame pin back in (again, be careful if that pin is asymmetrical!).

I took my completed project to a gun shop so that I could have the trigger weight measured using their Lyman gauge. Oddly enough, the average of 5 pulls was 8.5 lbs. As a control the guys there then measured the pull of a stock SD9VE in the display case. Again, 8.5 lbs. Anyway, my pistol's trigger feels awesome and the telling will be when I take it out to the range to check for light primer strikes.

I am very impressed with the customer service and speed of delivery as well as the final product (so far) but the video tutorial takes shortcuts for removing and-re-installing the trigger pin that could result in damaging one's firearm.

S&W spring kit

This kit was excellent quality and made the trigger pull much smoother and lighter. Would highly recommend

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