Hey guys I just picked up my Glock 42 and tried it with several holsters. I have one on order that fits a Diamondback DB9. The guns are about the same size. I Have a friend that tried it in a DeSantis Yaqui belt slide holster for a Sig 232 it fit just fine with a little adjustment of the tension screws. I also tried it in my Gould and Goodrich boot lock holster and it fits very nice in my uncle mikes pocket holster. below are a few pics.