This isn't a toy, an accessory, or something to play around with. You will not keep it loaded when it's not in use. You'll carry it on your person only, and only when you feel the absolute need to have it with you.

[ his pitch is still mild, his voice merry, but there's steel underlying all that now. this is Serious Business. ]

Use it only in the event of great danger to yourself, your housemates, or your friends. If I hear anything at all about you waving it around otherwise, firing it for no arguable reason, threatening one of the other kids your age with it, or otherwise showing off--