Andy, you idiot.
First of all, thats a crappy deal. If you sold custom guns for $50 a pop, you're stupider than I thought. You could have made about 7-8 times that amount, easy. Especially considering that the gun was probably worth more in the first place, before you put all that work into it. I personally doubt you did it at all, but if you did, you are the worlds dumbest crook.
You are truly stupid if you cant figure out ways to make money without getting thrown in jail. Even if you do decide to make it illegally. First of all, you were dealing cocaine; not only is it a good way to get thrown in jail, Its also a good way to get shot. Drug dealers dont last long at all; They get killed or thrown in jail. Try getting good at something worthwhile at least. Get good at picking locks or something, and collect various "keys of interest". A while back I got my hands on the masterkey to all Yamaha golf carts. I'd never use it, but hey, gets the old brain train going, doesnt it?