Rust Manual

MGL Ammo

3 possible drops, resolved through every nested sub-table down to real items.
Chevrotine 40mmChevrotine 40mmAmmunition4–8x37.5%
Grenade fumigène 40mmGrenade fumigène 40mmAmmunition2–4x37.5%
Grenade explosive 40mmGrenade explosive 40mmAmmunition2–4x25%

Chance the item is included whenever this table rolls. Approximate — doesn't account for seasonal or event-restricted rotations.