Its called a rolled crown.
the grooves are set back far enough to keep damage from occuring.
the grooves are set back far enough to keep damage from occuring.
gtmtnbiker98 said:raz-o,
What model M&P are you using for USPSA? I'm primarily an IDPA shooter - currently using a G17. I'm wanting to transition to an M&P9 since .40 S&W will not gain me anything shooting in SSP division. Just curious, have you had any issues and if so, what should I look out for?