All kits are limited at 9 slots in PR, my idea is: Have optional weapon slots which you can use by Alt + (Number selecting) or Alt + Mouse Scrolling. Weapons in PR, scoped ones, tend to work much worse in close combat, compared to non scoped weapons.

The German G36 which has two aim points, must either be selected for short ranges or long ranges (scoped or unscoped). This is a more arcade approach to reality, but is done because two types off rifles would take too much place in your inventory.
I don't believe that PR needs 18 weapon slots, but having to Alt + (number select) and still be able to do so with one hand, 12 slots could work very well - meaning that you use 1-6 for "most important" gear and Alt + 1-6 for less important gear.
Edit: I would like a confirmation if this is possible or not, new weapons could come, like flares showing where a cache is, trololol...










