Dents on my new gun

[foxyyy]

Just got hold of my new gun last week. Fired about 100rnds of FMJ bullets so far. Field strip it and noticed there were four distinctive "dents" on the railings of the receiver. A pair on the left side and a pair on the right side. Here are some pics to better illustrate it:

http://img88.imageshack.us/img88/4857/gun15of.jpg

http://img119.imageshack.us/img119/2207/gun21cp.jpg

What do you guys think caused this? Already checked my magazines if their mouths are the culprit but it doesn't line up with the "dents". Am worried that if I don't pinpoint the cause, it might get worst.

[Hawkmoon]

I don't see any pictures. I get two boxes that say "HOTLINKS DISABLED ... www.photos.ph"

It appears you have correctly entered the links to the photos, but perhaps that hosting site doesn't allow you to link to them. Check their rules, you may have to host those pictures on another site.

[foxyyy]

pics fixed...hope it shows this time

[lehcpa]

I think I have seen a thread elsewhere about S&W 1911's of recent production having a problem that might cause this. Try doing a search. If I come across it, I will let you know.

I am assuming S&W from the picture as I recognize the plunger that operates from the grip safety to de-activate the firing pin safety.