Out of curiosity, is it the same deal if Al gave the gun to Bob, and sometime later Bob gives Al money as a "thank you"?
Yes, it is. The money is the problem.
@ Gunnut17: Doesn't your dad own and keep firearms that you can use until you're old enough to buy one? This urge to get one that is "yours" is going to result in trouble somewhere along the line, I'm afraid. I know it's a drag being interested in this hobby when you're only 13, but so it goes.