Okay feel free to correct me if I'm wrong but after Honest Hearts is complete it looks like they remove Joshua Graham from the game. Which effectively cuts off the source of .45 pistols, .45 SMGs, mods for both, and ammunition for them as well.

Hopefully I'm not right on this but since completion I haven't been able to find him anywhere and as far as I know he's the only source for the new weapons and ammo for them.

gunrunners stock it after it's over

Oh sweet thanks so much I was worried that they'd removed Graham without thinking it through and cut off the supply of the new weapons and ammo. :celebration:

Do the gunrunners have the guns too or just the ammo?

They stock the guns too. They also stock the Yao Gaui Gauntlet, War Club, and Tomahawk. And the Fire Bombs... which makes me very happy.

I'm guessing gun runners will stock near enough ever new kind of wepon and ammo from DLC considering the robot inside cannot be destroyed.

sounds like a good plan, with the gun runners. though wish it would be added to all levelled lists after the storyline.