And those little sub sonic rounds are very quiet. And for those wondering, yes, the will cycle the action on the 10-22 and MK II pistol.
I managed to work up a lightened slide return spring for an Astra Cub modelo 2000 that would work with .22 short CB caps. It doesn't take much of a suppressor to quiet them down, either.
Rather than a 10-22, I went with a Remington Nylon 66, as dis Mitch Werbell when developing a MAC suppressed .22 rifle for a particularly interesting military application. Very neat, and particularly reliable, and with 15 shots available instead of the Ruger's 10-shot box magazine.
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