To get it to look its best, use a Dremel sanding wheel. Once you get it close to where you want it, use a buffing wheel with a little compound. Be careful to go at a slower speed. If it heats up to much due to friction, out of nowhere you'll take out much more than intended.
Here's one of the M&Ps I've done.
This is a different one where I rounded the sides a bit more and didn't cut it out as much. Sorry these are M&Ps, but I'm content with my Glocks. $150 for just undercutting the trigger guard is a bit much, it's not a 1911.
Last edited by jonconsiglio; 03-20-12 at 23:33.
Proven combat techniques may not be flashy and may require a bit more physical effort on the part of the shooter. Further, they may not win competition matches, but they will help ensure your survival in a shooting or gunfight on the street. ~ Paul Howe