I purchased a brand new Walther P22Q three months ago. Last weekend I was fine tuning the location of the rear sight and noticed that the sight is loose! It wiggles from left to right 1/16"! I emailed Walther customer service, got transferred to Umarexusa, who proceeded to tell me that it was normal for the rear sight to be loose like this. They seem unwilling to repair this condition. Please help me understand 1) is this normal? 2) what can I do to fix this? 3) what rear sight can I mount that will NOT move? Thanks!