drowsy anvil
You could apply the cosmetic and then open it by grabbing the quick pull tab and pulling it. Once open you can place your pistol in. once in you can grab the same tab you used to open it to close it and like the real thing you will be able to pull the tab and grab your pistol quick and smoothly. It would be a really fun and cool mod that I think people would like. 
rich dagger
That would actually be a good mod for role playing and stuff
fair wren
pretty cool if someone mixes it with the https://discord.com/channels/814225157664407553/1403582254076399667 suggestion