Can't beat a Thompson in a musical instrument case, it's a classic look.
Being that i play guitar and have lots of them, and obviously lots of cases for them too, I frequently use guitar cases to transport rifles, they usually fit pretty well, in an average electric guitar 'gig bag' type case, and many of those are padded too, which helps prevent your rifle from picking up dings and scratches when you heft it into the boot of your car. In fact my D-Boys M4 SIR fits so well in one of my guitar cases, it almost looks like it was made for it. I also find that when travelling on a train, a guitar case is less likely to have people start panicking than sitting on there with what is obviously a rifle bag. Which reminds me...
Because of my job teaching people CGI, where I show people how to do video special effects, such as making prop guns look like they are really firing, ejecting shells and emitting a muzzle flash which lights up the surroundings etc, quite often I take an old CYMA springer AK-47 into Manchester. A rectangular hard guitar case of mine fits that AK-47 perfectly with the mag still inserted. Funny thing is, about three years ago there was some big event on in Manchester and there was some kind of a security alert at Piccadilly railway station; the police were randomly stopping people getting off the trains and searching them. Sure enough, there's me walking up to the police at the ticket barrier with that hard case with an AK-47 in it (and bear in mind that this is painted up as a movie prop, so kit looks exactly like the real thing). They let me walk straight through without asking me to open the case, can't imagine that occurring if it had been a rifle case.
So here's some DIY of sorts: Me with that CYMA AK and some CGI'd muzzle flashes, ejecting shells and secondary lighting effects lighting up the surroundings...
