Yesterday I purchased a new Walther SP22 M2 for $250.00 "out the door price". It has good balance and looks nice. I have only had time to shoot 14 Federal bulk rounds through it and it was accurate and functioned well. I Googled it and didn't find many reviews about it. Has anyone had either good or bad experiences with this model? Is it okay to dry fire this model? Does anyone know how many SP22 handguns were manufactured? Also, can someone provide me with any information on how to take it apart to clean? A step by step photo disassembly would be really helpful.