Seriously though, Home Depot is a good place to get all the materials you need to make a silencer, for any gun!
Made the above silencer for aprox $12 and its aluminum.
Go to Home depot, into the hardware department and get:
- 4ft 1-1/14" aluminum pipe.
- round rubber end cap for 1" pipe
- 6 metal set screws aim for a number 4, I used a 6 ((or was it 8... forget)) anyway it was a little to big and hard to get down into the smaller sizes so that it would be flush.
Get a pipe cutter, they have cheap $5 ones at Home Depot if you don't have one ((yes, just that old fashioned pipe cutter with the little disc)) to make the length you want. You can also make some design into the barrel with the rings ect, just don't go through

. Also, really if you plan to do this, make sure you measure enough for it to fasten to the outer barrel. Once you have everything set up, hammer the round end cap into the inside of the aluminum pipe, try to do this as straight as you can, and debur the pipe so that it stays going in straight.
Sure it don't look as pretty as some the $100 silencers, but for $12 and about 15 min of work, its turns out super sweet.