The RailwaySniper.esp file you have requested: Modifications / Miscellaneous / Railway Sniper - 3.01kb is not available. Perhaps try browsing all files for the game Fallout 3 and upload any files you want to share or are missing. This is the only information we could locate:
1.0-The railway sniper shoots railway spikes at high speeds, and can explode a person in one to two shots.This weapon can be found at the armory in megaton, which is in a very hard safe. There is also a stash of 75 spikes for your use. ENJOY2 Railway Sniper is a mod for Fallout 3. This version deletes the 2nd railway sniper in your Tempenny suit, and the floating spikes outside the map.