All in all I would consider it not worth trying to conceal, or even get permission by a Don. Can a Don even endorse such a thing? Even so you'll be labeled by that Don and maybe others as weird gun crazy guy.
Give your gun to a respectable airsofter near you such as haryleyb (basing this purely on his amount of posts and trader rating
). Then after first year try and get an offcampus residence with a bunch of mates. Don't know how it goes over at your Uni, but here at mac most people have to move offcampus after 1st year. Then it'll likely be less trouble storing your stuff. Even better get you parents to buy a house for you and rent it to your mates, like in my case :tup: , if money and spoiling parents permit.