I realize that every city will have their own rules but generally speaking is it legal to shoot a CO2 airsoft gun in cities. I'm asking because I have probably shot 3,000 of the biodegradable bbs at a target set up in my backyard over the last 2 weeks. I make sure my neighbors are not outside then I pull out the targets and go at it. It is a ball but I'm just wondering if it is a problem. I asked a cop and he said firing any kind of gun in the city is illegal, which I think means he doesn't have clue. I mean seriously, any gun?? Lot of kids with cap guns and squirt guns are in for a rude awakening. I have my targets set up in front of a shed and behind the shed is a 7 foot synthetic fence. I practice at 5,7 and 10 meters.