Reason I was wandering , I had been noticing a lot of guns , revolvers , Mark series etc. that some times the back sight would be along ways to left , or right instead of close to center , hadn't thought much about it before , or not noticed I guess , made me wonder if one your looking at is a long ways to either side , was it one they had a hard time getting on target , or nothing to worry about ?? I know of course there test fired to make sure they work .