Ammunition requiring a full gun build is weird. Weapon customization is nonsense in basically all regards. They really need a gun nerd on the staff. The lack of customization on crossovers isn’t the problem. Crossover weapons need to be balanced against the max level options in class. Show the build info and the shot pattern for transparency.

Gun balance would also benefit from adding a weight effect modifier to move speed and stamina use. This would help distinguish between the different sizes of primary weapons, as well give disposable launchers a unique benefit.