What to keep in a forward vertical grip ?

[bushmaster1313]

I find a forward vertical grip to be an excellent and inexpensive accessory on a 5.56 bullpup rifle. To my surprise the bottom of the grip unscrews to reveal a watertight compartment about the size of a roll of pennies.

What is commonly kept in forward vertical grip compartments ?

 

[desi2358]

Batteries for a laser or illuminated optic are the only things I've seen it used for.

 

[Glenn R. McMannly]

Copium suppository when you realize your bull pup is worse than an M4?

 

[lihpster]

Bore Snake

 

['79 Magnum GT]

A cat.

Rick