For use with the G2, F19, Delta, Gamma, Omega, F5 and I'm told also the Eurotek Pro as long as they have the screw on fitting. That would also make it compatible with the Teknetics Minuteman which is a rebadged Eurotek Pro at a lower price point.
See my 3/24 post for pics and more details.
See my 3/24 post for pics and more details.