>>5511509aiming laser for better "hip firing" accuracy or a crosshair for memes. Add a cooling system to the barrels to reduce durability damage, a motor to chance it's rate of fire from slow accurate long burst attacks to -BULLET HELL BRRRRRRR!!! Note that you shouldn't do short bursts with a minigun irl or you'll fuck it up. Long bursts or full auto is he way to go.
IRL the rate of fire is determined by how much electricity you're feeding into the motor, and ammo capacity upgrading is pretty straight forward. Both thinks I feel confident Jacob could achieve.