I was at the range the other day shooting my buckmark and another man with his son were shooting the Walther p22. I really liked the design except that it is too small for my hands. Anyway after they had fired their p22 for some time the front sight came off. We were able to find it and the man noticed that he had 2 extras sights in the box. The gun was new to them so he too like me did not know this. My question is it very common for the front sight to come off from shooting? Is the front sight supposed to be glued on? Thanks for reading my thread.