Kiloton radium rifle

Kiloton Radium rifle is a unique weapon in the Fallout 4 add-on, Far Harbor.

Characteristics
The Kiloton Radium rifle is a unique radium rifle that bears the Explosive legendary affix. It is therefore quite similar in function to the unique submachine gun Spray n' Pray as they both can be fully automatic and deal an additional 15 points of explosive damage per shot. This property, coupled with the 50 points of radiation damage that come standard with all radium rifles, makes the Kiloton Radium rifle an exceedingly powerful weapon. It should be noted, however, that the gun's damage output largely depends on its firing mode - on full-auto it will lay waste to pretty much anything, but equipping it with a semi-automatic receiver will result in a massive decrease in relative firepower.

Locations
It can be bought from Kane in The Nucleus after joining the Children of Atom.