This is the first 22LR silencer I designed. I wasn't planning to upload it, but AllStrobedUP asked me to do it, so why not? They're easy to print - it takes about 3 hours to print one. I print three at a time, so if one breaks when I go to the shooting range, I still have a backup. Now with the $0 tax stamp, you're all set. There are two versions - one with a 1/2x28 thread, and the other for a 1/2x28 to 3/4x16 thread adapter.