Is a trigger "hitch" normal with a new M&P 9C

[Gorme]

Just bought an M&P 9c. Forgive me if my terms aren't correct, but I notice when firing that there is a noticeable "hitch" that occurs when you start to pull the trigger, like something in the trigger is slightly rubbing something on the frame, and it then pulls easily back and fires from there. The trigger pull doesn't feel "smooth" for this reason. I found myself tempted to get through that initial click or hitch and then fire the gun instead of one smooth motion.

Is this normal with a new gun? Two guys who work at the range dry fired it and said that they think it could be a small burr and it'll work itself out after I put a few hundred rounds through it. I've fired several M&P9C range guns and never noticed this with them, but then again they've probably had a lot of rounds fired through them.

 

[Gorme]

Just bought an M&P 9c. Forgive me if my terms aren't correct, but I notice when firing that there is a noticeable "hitch" that occurs when you start to pull the trigger, like something in the trigger is slightly rubbing something on the frame, and it then pulls easily back and fires from there. The trigger pull doesn't feel "smooth" for this reason. I found myself tempted to get through that initial click or hitch and then fire the gun instead of one smooth motion.

Is this normal with a new gun? Two guys who work at the range dry fired it and said that they think it could be a small burr and it'll work itself out after I put a few hundred rounds through it. I've fired several M&P9C range guns and never noticed this with them, but then again they've probably had a lot of rounds fired through them.

 

[OKFC05]

I'd suggest cleaning the trigger action with some CRC "Dry" silicone spray and dry firing/shooting about 500 rounds before deciding if you want someone to deburr it for you. After that it may not need any work.

 

[Spotteddog]

What OKF said. Mine was pretty crunchy too, pre cleaning and firing. The trigger on mine improved steadily through the first 400 or so rounds.

 

[pberry]

The first part of the trigger travel is what I call the take up. It is moving a bar back pressing the firing pin block out of the way. After the take up the sear will move. The pull should be harder and chrisper at that point. The sear travel is very short and the firing pin is released. If you remove the slide, you can watch this happening. You may have to put in an empty mag for the sear to move. It depends on the model.
Phil

 

[sdrct]

I found with both my M&P's that they really seemed to shoot in over about 1000 rounds, more so than I had ever noticed on any other pistol.

 

[Gorme]

Thanks. Is this the CRC product you are referring to? It sounds like this should be used instead of CLP?

I didn't see anything in the manual about cleaning the trigger action, and so I'm not sure what that specifically is. I assume it's in the area above the trigger where the spring is.

 

[Spotteddog]

Follow the linkage rearward. Then tip over the slide and see where the link bears upon. DO NOT oil in the striker assembly area at the rear of the slide.

 

[Bullitholz]

The "hitch" that your noticing happens because of the interaction of the hump on the trigger bar pushing the firing pin stop plunger upwards to disengage the firing pin, allowing the gun to fire.

The "hitch" is there because the tip of the "hump" in the trigger bar is rough and has squared of edges and corners. This problem also exists with the plunger in the slide as well, it has a more or less square corner that the hump bears against.

The fix is really simple but does require some disassembly of the slide to get the plunger out so you can work on it. The trigger bar can be stoned/filed/polished without taking it out of the frame, at least that's how I did mine.

The biggest improvement will come from rounding the "corner" off of the FPS plunger into a nice radius. You have to get the plunger out of the slide so it can be chucked into a drill, spin it and apply a file or stone, it's REAL hard metal so screwing it up is pretty tough to do IMO, and round the corner off, polish it up with some fine sandpaper and reassemble the gun. After doing all of this the hitches and the gritties will be gone for good. When I shoot my .45 now I don't notice ANYTHING rough or hitchy, I simply pull the trigger back till I feel the sear and squeeze a bit more for the break, mine measures at 5.5 lbs. and is REAL smooth.