I picked up a used Gen4 Glock 34 MOS for some of the local, informal 3 gun shoots around here as well as just to dub with at the range. I'm planning on an RMR and suppressor height sights at some point. I'm looking for suggestions for a holster that will accommodate the RMR, have a sight channel "tall" enough for the suppressor sights and preferably dropped / offset. Oh, and not super expensive.

5.11 Thumbdrive is a solid option. Mine works with no modification.

I generally don't have any holster fitting issues do to suppressor height sights on various holsters I've used. They all seem to have plenty of clearance built in.

I've done minor trimming on the top edge of holsters to clear my RMR.