Had some time to kill and a new .22 headed my way so I made a tuner. It weighs 6 ounces, stainless, about 1.25" x 1.25" with a little crowned extension on the front. I have done similar in the past and they seem to work. This one is closely threaded on the barrel and has an "O" ring for friction. It's on an ISSC SPA 22.
