This mod adds in an M37 Ithaca into the game. It comes with unique static and sound entries, as well as having it added to the appropriate perk lists, repair lists and weapon lists. It also comes with two unique modifications for it, a side saddle and a long tube extension.
It and its modifications can be found on Doc Mitchell's operating table.
Also included is vendor leveled list integration (Chet, Johnson, Gun Runners, and a few others). Also found on many types of enemies.