Glock firing pin spring in an M&P??

Zebra War Wagon · Oct 19, 2019

I have an M&P 2.0 compact in 9mm and want to gently raise the trigger pull. I have been reading that the M&P factory firing pin spring weight is 5 lbs, and there are several firing pin springs for Glocks rated at 6 & 6.5 lbs. From what I read, these Glock springs can be used in the M&P's, and will increase the trigger pull .5 to 1 lb. Does anyone have any direct knowledge or experience replacing the M&P spring with the Glock spring? If so, did it in fact raise the trigger pull slightly?

Saudade · Oct 20, 2019

I have none. I did some reading on the subject but the posts I came across (all pretty old) were about Glock springs to reduce the pull weight.

Did you measure your current pull weight?

Glock springs are cheap, you might just give it a go.

If nothing else, this can serve as a bump.

OKFC05 · Oct 20, 2019

The S&W springs for the MA (and other special state) models raise the trigger pull. The trigger linkage return spring might be quicker and easier to play with than the striker assembly.

Rule3 · Oct 20, 2019

Perhaps Apex spring kit??

Details

Zebra War Wagon · Oct 20, 2019

Looks like this Apex Carry Duty spring kit gives another 1 to 1.5 lbs. This may be the way to go for me. My LGS/Range has an S&W certified armor on site and i would get them to install. I watched a You Tube video on breaking the M&P down and I don't think that's in my core competency to do? Hate to go to the "man" but I don't think I have a choice if I want to go this way??

Pondoro · Oct 20, 2019

I would worry about the legal implications of a not-designed-for-S&W part. I realize you want the trigger heavier. I could still see a lawyer telling the jury that this hot rodder, bozo, redneck, shade tree mechanic messed around putting Glock parts in a SMITH AND WESSON! (He would yell the last part.) An aftermarket part that says, "For Smith and Wesson M&P Pistols" on the package is very different than a "Glock" part.

Even if a professional gunsmith does the job. You still asked him to do it. Now if you go to a gunsmith and say, "Make the trigger heavier" and he, as a pro, puts in "a heavier spring" that is different. But if the part or the receipt say, "Glock" anywhere I would be leary.

mmb617 · Oct 20, 2019

In the hypothetical scenario listed above do you really think a lawyer would find out that you'd changed a spring in your gun? What would even make him look for something like that? I think that's a little far fetched. Perhaps you're watching too many CSI shows.

Pondoro · Oct 21, 2019

mmb617 said:
In the hypothetical scenario listed above do you really think a lawyer would find out that you'd changed a spring in your gun? What would even make him look for something like that? I think that's a little far fetched. Perhaps you're watching too many CSI shows.

I expect that if the law got involved they would search your house. If they found a receipt that said, "Install Glock trigger spring" or a receipt from "Guns Parts Inc." for "One Glock Trigger Spring" it might interest them. Everything is evidence. If a civil lawyer sued you they might very well ask, "Did you ever modify the gun?" There is no 5th amendment in a civil case. Being able to truthfully say, "I told the gunsmith to install a heavier spring" is probably a good thing. Being forced to admit that you asked for a "Glock Spring" sounds like it would provoke a response.

Flyingfool · Oct 22, 2019

Show real world case law where anything of the aort was brought up. And then if it made any real difference to the outcome.

If no evidence exists. This is a worry that is totally without any proven merit.

Sure anything is possible. But INCREASING trigger pull weight is LESS likely to raise concerns than the millions of trigger jobs and apex and other spring kits to LOWER trigger pull.

Glock probably doesn’t manufacture the spring themselves. Instead they probably have a private outside supplier manufacture the spring for them. So the fact they package the spring and comes from Glock, it virtually meaningless. In the end it is a spring with a different coefficient. For all we know, the heavier spring supplier for S&W for MA guns for example, could be the exact same supplier Glock uses for their heavier spring. So is it a Glock spring or a S&W spring????

Just my opinion, and everyone must make their own decisions as to what amount of perceived risk they are willing to accept.

If done, throw away/destroy any receipt for the part and work done!

Glock firing pin spring in an M&P??

Zebra War Wagon

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OKFC05

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