1) Make the in-game "Options" menu from the Pause screen the same as the "Options" menu on the title screen
- why isn't this possible?

2) Allow filtering of gun parts by category when you're customizing a gun
- for example, when I'm in the "Receivers" section, let me filter by class/RPS/Capacity/Weight/etc, because eventually it gets tedious looking through the super-long list of parts you eventually will get. Materials, and therefore gun parts, are not that hard to come by, so sorting them would make crafting your personalized gun more comfortable.