Lead Hoarder

2d4 piercing damage + 2d4 fire damage.
Range: 40/100
On hit, the wielder can roll a d20, on a roll
greater than 10, they may make a bonus attack
for 1d4 piercing damage + 1d4 fire damage, then
they roll again. On a roll lower than 10,
their attack is over. On a roll lower than 5,
the gun overheats and cannot be used next
round (max 5 bonus attacks).