The G42 is in a JMCK IWB Universal I've had for a while that I originally ordered with an UltiClip. The UltiClip worked decent on shorts with a drawstring but didn't have enough bite for slick pants like the 5.11 Apex and Vertx I usually wear. I've seen some good reviews for the DCC clips so I ordered one to see if I could make it work. It took some modifying to the holster and the clip but I'm really happy with the result. That little clip will hold on to anything.
Today my second JMCK/DCC combo showed up. It's also the IWB Universal. The clip on it will work with or without a belt. Like the smaller clip on the G42 holster it will absolutely stay put. Drawing slowly or aggressively will not pull these clips off of gym shorts or slick pants.
These holsters work really well for AIWB, and I say that as someone who has had shit for luck carrying larger guns AIWB. I'm going to try AIWB again, this time with a Wing Claw 2.5 with these clips.