Have pity on him
! I sent him a Surefire wrench, which is just a flat piece of steel basically. It fits all shotgun forends that I'm aware of, though. He'll be most underwhelmed at the level of technology, and feel like a doofus for asking for something so simple, once he see's what's required
The simplest things are the hardest to explain. In high school we had to write instructions on how to make a peanut butter and jelly sandwich, for a person who's never made a sandwich before.
How would you explain the color blue to a blind person, who's never seen?