WMR in any semi action is tuff to get right and reliable, be it pistol or rifle
there is almost always somebody in cyberspace somewhere pitching some variant ala the current KeLtec
the old "original" AMT IIs were arguably "best of breed"(I do like mine); reports on current version by current owner of H-Standard "name" vary quite a bit re: quality and reliability, The "names" have been passed around quite a lot
always somewhat a gamble, any semi WMR
but no shortage of WMR revolvers out there; if wheelies be acceptable to you, look for a k-48
(and bolties or lever actions for rifles)
happy hunting !