It depends on the model of Ruger 10/22. Some have a threaded barrel, and some don’t. If your Ruger 10/22 doesn’t have a threaded barrel, you can still install a flash suppressor by using a muzzle brake adapter.
If your Ruger 10/22 does have a threaded barrel, then all you need to do is find the flash suppressor that you want to use, screw it onto the barrel, and tighten the screws. Be sure to read the instructions that come with your flash suppressor carefully, so that you know how to properly attach it.
Johnny Answered question September 13, 2022