That is one way of telling how much the gun has been shot. With that "lesion", anyone telling you the gun is NIB is a liar. I always look for the amount of gas cutting to tell how much the gun has been shot. It is a normal "wear & tear". All of my guns have it depending on how many rounds I have put through them and at what charge.
With over 15 perCUSSIN' revolvers, I've been called the Imelda Marcos of cap & ball.
SASS#3302 (Life), SASS Regulator, NRA (Life), DGB#129
Wolverton Mtn. Peacekeepers (WA), former Orygun Cowboy (Ranger, Posse from Hell)