My favorite design (of the ones I own, anyway) is the Surefire Ryder 22. The threaded end of the Ryder locks into place, and cannot be loosened by twisting on the suppressor tube. You need to use their special tool to disassemble the suppressor, which is a good thing, IMO. The threaded end of both the Mask and TBAC are just threaded into the main tube, and they do not lock into place. So, when you twist the suppressor tube to try and remove it from the muzzle, sometimes the tube unscrews from the thread adapter. Rather than removing the suppressor, it wants to come apart. To remove the Mask or TBAC, it's nice to have a wrench handy.
I have an older model Ryder 22A, with the aluminum baffles. It's crazy light, but it's an absolute pain to clean. The Ryder is also the least effective suppressor I've used on a pistol, as far as noise reduction. It's the loudest of the three rimfire cans I own, and louder than the Switchback and Sparrow my friends have. On a rifle, the Ryder 22A is fine, just as quiet as any of the other rimfire suppressors I've tried.
The newer Ryder 22S has stainless baffles, which should make for easier cleaning (vibratory tumbler and/or ultrasonic cleaner), but I'm not sure if it will be any quieter than my 22A when mounted on a pistol.
