If you could have one new accessory...

[calaveras]

I'm a mechanical engineering student. I've got lots of spare time, and an affinity for design problems. Shoot me ideas.

If you could have one (or more) firearms related accessory/part that isn't currently on the market, what would it be? What problems do you have with your gear that need fixed? Post your complaints/desires below and I'll see if I can come up with some kind of solution for you.

[essjay]

A safe that bends space-time so that it never runs out of room.

[Wallabing]

Drop in underfolding stock for AK's.

You'll become a millionare.

I've been thinking of a design for a long time.