I have a Thompson Machine. Zelpher XL. I spoke to the guys at the NRA show in Nashville they said it is rated up to a .22 mag and a .17 hmr. I like mine don't know how to compare to others bc I don't know anyone else that has one. I know my record of 17 black birds before they flew off ain't bad.
I also have a Thompson Zephyr XL. It works fine and is easy to take apart for cleaning. However, it's a little large and heavy for handguns. I've had to put taller sites on two pistols for a clear site picture. I think I'll buy a Lane titanium rimfire can for my handguns. Much lighter and smaller diameter. Lane suppressors are made in town here. So I took my Zephyr out there and compared the two on my M&P22 pistol. The much lighter Lane can balanced much better and sounded just as quiet.
Bob