Not crazy about my #19 - getting a lot of misfires. When I screw down the locking ring, half the time I end up unscrewing the button.
Sometimes the button seems to even unscrew itself....? Do I need to put some loctite on there or what?
Watch the Todd review of the #19. pay special attention to the mods he did to get it performing top notch.
https://www.youtube.com/watch?v=I4Mv77UANoo