That would be a strictly custom affair.
marlin 35 cal. lever action. rifle/ Marlin makes the rifle ,but not the ammo for it.
the 380 is a 9mm short
Remington.
Chipmunk
NO
No.
No.
No one that I know of.
Let a gunsmith do it.
no the rifle is 85 cal and is second lowest to the pistols
The case of the 9x18 cartrdige is 1mm longer and the slug is slightly wider. In metric .380 ACP is 9x17.
Marlin model 80