Railway rifle (Fallout 4)

The railway rifle is a weapon in Fallout 4.

Weapon modifications
Receiver - standard receiver Automatic piston receiver Barrel - short barrel Long barrel

Locations

 * Big John's salvage - inside Big John's shelter, located in a blue overturned railway carriage just behind his house. (Sidenote, jump on top of it, there is a cable inside that you can follow to turn on the trapdoor.)
 * Potential reward for completing the quest Underground Undercover.