Obtaining This Machine unique weapon bug.

[Solmny]

So i finished the dealing with contrera un marked quest, but when i finished it i didn't get this machine, the dialouge stopped at the end.. It should continue after saying that the deal worked out but he needs to be carefull. he then needs to say that i did good and he should give me the rifle, but he wont?

[Meaty McLoven]

player.additem 000f062b 1, 100

^ Use that in the console to add it to your inventory.

I believe if you choose not to kill Keller, then he won't give you the gun. I imagine that may be what happened to you. Or it could be one of many other glitches.

But if you've completed the quest, no harm adding it through the console. Just make sure you exit the game after adding it, and then start the game back up, so achievements will be enabled again.