Cybergun GSG-522 PK help
So I got this given to me as a gift and I have a question about it as I am just starting with the sport. According to the box its a full metal build, has a 9.6 NiMH battery, adjustable BAXS system and fires 370-450 fps on 0.2s. Now if memory serves correct field limits are 400 fps correct? Unfortunately, I do not have access to a chrono so I can't verify the fps claims. My question, really, is how can I verify the fps without driving all over hell's half acre and not spending anything to do so? Any suggestions?