Is the firing pin hole in the breech face perfectly round ?

mine has a notch at the bottom and i noticed strange marks on the fired primers.

Also i'am sarting to get light strikes


thanks

The tear drop shape on a primer fired in an M&P is normal.

Light strikes is something else. Are the rounds going off? If there are a lot of rounds through the gun when was the last time you removed the striker and inspected/cleaned the striker and its channel?

Thanks for the info

I besure and clean the channel and try again

i had the same question a few months ago. seems to be normal and does not cause any problems. my primer marks are teardrop shaped.

While you're cleaning the striker tunnel, turn the slide over and look at the bottom of the slide just to the rear of the breech face in the center of the slide. You'll note a small hole. This is a debris drain so any particles that enter the striker tunnel have a place to go. You need to clean this out as part of cleaning the striker tunnel.

I think you might have answered my question Is this the hole shown on the image ? I've been scratching my head about it for a while ...

nope, that's a completely different hole.

Sorry for off topic,so what is this hole for, should it be "filled" with something ?