Maybe include a "workbench" of sorts to customize the weapons you can get to help out with accuracy
Accessories
Hair Trigger - Increase firing rate or Attacks made in a turn.
Hand Grip - Increase accuracy
Red Dot Sight - Increase accuracy
Suppressor - First strike ability (maybe?)
Ammunition
Hollow Tip - Increased Power (considering armor piercing rounds are illegal for civilians in practiclly every country)
if i think anything else i'll post it