Burr on top of hammer

[armaliter]

Just bought a brand new M&P AR and took it to the range and ran 150rnds down range without a hiccup and it was spot on at 100yds after making a few adjustments with the iron sights. After taking it apart to clean I noticed that the grease mark pattern on the bolt wear was only half the width of the hammer and noticed a small burr on the top of the hammer. Question is should I leave it alone or take it off and if so what grit sandpaper should I use? Thanks in advance for any help- ken

 

[john traveler]

The preferred tool to remove the burr is a small, flat stone, such as is used for sharpening a pocket knife. Just a few strokes to remove the burr and not change the hammer nose profile.

If you do not have a small stone, you can use 600 grit wet-or-dry abrasive paper backed with a flat file or strip of metal.

 

[Alk8944]

Or, since you said the gun functions properly, just leave it alone and the "problem" will take care of itself shortly.

 

[armaliter]

Thanks guys for the help. So if it aint broke dont mess with it. Ill just keep an eye on it and see if it works itself out.