I have a S&W M&P9C that is starting to burr up the locking edge of the barrel where the slide locks it in while in battery. It is also starting to kick the take down lever (just in front and above the trigger guard on the left side ) back to the locked position. When this happens you can see movement in the recoil spring, if I move the recoil spring up a little the take down lever stays in place to release the slide for cleaning.
I am looking for insight as to what is happening to this weapon as it just started a week ago. Other than the burr and kicking out the take down lever everything else is normal and functional.
I refuse to be a willing victim