I noticed the Railway Rifle nailed to a wall in a shop. at Mick and Ralph's
And I was like gief!!

But I cannot find it anywhere so I went straight for The G.E.C.K, and indeed the "model" is in the game,
but not the actual ingame item.

Whats up with that?

Those are actually part of the wall/desk's model(?) and not weapons.

There are also no railway spikes so you wouldn't have any ammo for it. I also noted that there didn't seem to be a way to craft any weapons either.

I guess they choose to add more weapons I.e 9mm, Lever Actions, Single Actions etc etc rather than make scavenger weapons.

Though if some one wanted to mod it, should be able to.

Well to be fair, the West is more developed, so the need for make-shift weapons isnt really necessary. That being said, IIRC the Rock-it Launcher is in the game.

its kinda silly not to have the railway rifle in the game though.. i mean look at all the train tracks.. and train stations and trains...

Well all the files are in there anyway, http://img225.imageshack.us/i/98445067.jpg/
but they just skipped it?
With the files there i guess its just a matter of modding, i dont have the experience tho.