It’d be nice to have some wacky gun customization, depending on how intricate 4.0 wants to go with it. I had a post a while ago talking about this.
Maybe you could put a stock and a longer barrel onto an Ace, or put a 16x scope and a bipod on a colt. Stuff of that nature.
I’m probably taking it too far, but it’d be nice to have the more unrestricted customization of 2.0 back. Some things should still be restricted for balancing reasons, but for the most part I think you should be able to put what you want, on what you want. I want to put a bipod on my Cobra.