I usually pay special attention to markings as I prowl auction sites. This is a snip of a picture that kind of jumped out. The guy must have been hung-over from the company picnic or something; looks like he played with at least three different styles of number punches. It's on a 2"-barrel M&P. Does this look legit?
Yes, but someone has rounded the rear corner off and taken part of the last two digits with it. Number stampings always look smaller when made shallower.