Well I use the classic HW on a couple, A&M Twink on my FAC .25 (might be about to change) & a modified standard shroud on my MFR.
Thoughts/opinions,
there are many mods that work to a greater or lesser extent, there are a few that are useless,
generally I don't find that rimfire mods work particularly well on sub 12, although the A-tec wave is meant for rimfire, so maybe those do.
Phutt for your buck, the HW is probably still the benchmark.