Discount Ammo

[Gboon]

Gives unlimited ammo once your ammo hits 0 or on activation until you let go of left click, but the recoil rapidly becomes worse and worse until you need to be basically hugging the enemy.
Or damages you in a small AoE because that discount ammo is unstable and just constantly explodes.

 

[Luro]

maybe instead just a +50% ammo item that increases reload time by 2x if you shot recently and reloaded, if you didnt shoot in the past 2-3 seconds then its a normal reload speed. With this its a farming item and not that much of a teamfight dps increase (still is though) not quite the same item but "infinite" is always gonna be broken somehow