I shoot my co2 pistol in my downtown apt for over the last three years, day and night and never had a problem just my gf hates finding bbs on the floor. my grandmother use to shoot her co2 pellet revolver in her basement in edmonton for as long as i remember.
just remember not to be seen with your windows open, just like when your cleaning your firearms do you do it in front of the window NO !!
just remember not to be seen with your windows open, just like when your cleaning your firearms do you do it in front of the window NO !!