Yes, yes, I r kid u. "Tactical" stuff always makes me laugh for some reason.
So anyways, I really should try taking my own advice every once in a while. All this talk reminded me of an old project...
I wanted a quickly removable, adaptable car camera mount and had settled on Picatinny. However I was stuck on trying to figure out how to make a printable quick-release mating attachment...
Sorry for bad photo quality; unfortunate consequences of liking black.
Those are printed in black flexible TPU. It actually holds pretty well and is still quickly removable since it's, you know, flexible. Next version will have some recoil bars baked into it to help prevent it from sliding.
Not sure if it would be rigid enough for a cram 'n jam, but just food for thought.