M&P trigger return spring

[TAP]

I broke my stock trigger return spring on my M&P FS 9mm today. I have 10,547 rounds through this gun and this was the original spring. I just replaced my recoil spring before hitting the range (second time since purchase) and the trigger return spring broke after 22 rounds into my practice session. I received some replacement springs about 3 weeks ago after a few months on backorder. I thought about replacing the spring this morning but I was short on time and my gun was filthy so I decided I would do it sometime this week.

I think I'll stick to a 5,000 round replacement schedule for my recoil spring and trigger return spring. Any other parts I should consider replacing with 10k down the pipe? I have an extra striker assembly so I may replace that too (my current one is the original old style) as long as I can get a replacement in the next few weeks.

[JV_]

I replaced the recoil and trigger springs together, at 5K. I would replace the slide release every 10K. I broke the left side of 2 or 3 releases.

[orionz06]

I believe the new springs have a life of 10,000 rounds now. DocGKR, can you confirm?

[JV_]

When thinking about trigger return spring life, don't forget to consider dry fire.

[Pennzoil]

While it's apart you may want to replace the slide stop assembly @$16 as your right around the round count I broke both of mine.

[TAP]

I just gave it a good cleaning and replaced:

trigger return spring
slide release assembly
striker assembly
recoil spring (before my trigger spring broke earlier)

Now my reset isn't 100%. Sometimes it lags. Any ideas?

Maybe the new striker assembly has something to do with it???

[JV_]

Did you put the trigger spring in correctly?

Is the open part of the trigger spring loop facing up or down?

[TAP]

It was definitely the new striker assembly. Just replaced with the old one and it works great. Why would the new striker assembly hang up and not allow reset?

[Savage Hands]

Maybe the new striker assembly is rubbing against the striker block some how?


A tip that Randy mentioned was to keep the trigger return spring lubricated to assist in its life.

[TAP]

Just talked to my friend who did a trigger job for me. Turns out my striker is tuned for this setup. I will need a new trigger bar and sear to make a new striker work. Makes sense...I didn't think he tuned the striker.