I have a laptop,and it showed up fine! I just clicked on the link and logged in and there they were! It looks like it would work with any rifle with a trigger guard that has a little "meat" to it. On something like a CZ with the thin strap TG, I don't think it would work without adding something to hold the adjuster!
but maybe once it is set, it would be OK!
BTW: I installed an adjustable sear, and the rifle now has maybe 1/32" of overtravel, I can live with that!