M&P 40 trigger Job

[magnum12pm]

I did the Burwell trigger job on my MP 40 this weekend for a little project. It was very easy and sucessful. The trigger pull is now 5 pounds and three ounces. It seems like less since the work also smoothed the pull out all the way through the trigger stroke. I disassembled it five times, going just a little at a time on the sear, until it felt right. I didn't want to over do it. I recommend it to anyone who wishs to improve the MP trigger.

 

[magnum12pm]

I did the Burwell trigger job on my MP 40 this weekend for a little project. It was very easy and sucessful. The trigger pull is now 5 pounds and three ounces. It seems like less since the work also smoothed the pull out all the way through the trigger stroke. I disassembled it five times, going just a little at a time on the sear, until it felt right. I didn't want to over do it. I recommend it to anyone who wishs to improve the MP trigger.

 

[Matt Murphy]

I've read that Burwell does great work and it's great he tells everyone how to do their own trigger jobs. I would like to try it but, I'm sure I would goof it up. I might send mine to Burwell or back to S&W to see how much they can smooth my trigger out.

 

[magnum12pm]

Matt: I would say the most difficult part is removing the rear sight in order to get the striker safety block out. That rear sight can be a pain. The rest really is just going slow and carefull. It also helps if you have the proper tools such as stones and fine files. I used a dremel tool and auto rubbing compound for the final polish on the mating surfaces, probably not required but doesn't hurt. I will caution, never use dremel tool for anything but felt tip to polish. You will most likely be sorry if you do

 

[Matt Murphy]

I've heard that before about the Dremel. They've caused lots of frustration and headaches. I carry an M&P40 on-duty and I think I'll leave that stock. I would like to buy an M&P9L or pro and get a trigger job that leaves the trigger with a 3-4 lbs trigger pull. Very light and very smooth just for target shooting or competition. I'll send it out for the work though.

 

[magnum12pm]

Matt I agree with you on the duty gun not being modified. You could problably get away with polishing the striker safety block button and striker-sear engagement surfaces without any metal removal. It would smooth the trigger stroke some, without changing the actual trigger pull weight much. A smooth trigger pull often improves a shooters accuracy greatly. However I feel your plans are most likely on the right track....

 

[gglass]

I did the Burwell trigger job on mine and love the results. The trigger is now ~5 lbs and has no grittiness, no stacking right up to the break. The break is now pronounced and has almost no over travel.

I have shot the M&P 9 Pro Series and will be buying one this month. I have to say that the Burwell trigger job on mine feels eerily similar to the 9 Pro without the grittiness.

Unless you are comfortable with gun smithing at this level, I would not recommend doing it yourself. I would also never recommend that a LEO do this to their duty weapon... I actually had to relearn my trigger resets and grip after the trigger job so that I would not accidently double tap.