Best spot for the Wall Hack achievement?
 

Besides finishing the campaign on Ultra Nightmare which I don't plan on doing (there's goes 1 completed game off my list), the only achievement I have left is the one for killing 2 guys with one railgun shot through a wall. I didn't see a good spot for it in my run through the DLC. I railgun killed 2 enemies with one shot who where behind chest high wall cover, but that didn't count. Anybody find a good spot to get this ach.?

You can do this at the Refinery, just after you get the Nailgun. Follow the path and look for a corridor to the right, wait for the one patrolling to stop next to his friends. Line up the shot and voila.

Worked for me. Thanks man.

works for me also thanks for the info

So, say you missed that spot on your first trip through. Is there anywhere else that this is doable? It won't let me back into the refinery, and everywhere else that I've tried doesn't have any enemies to kill.

You can replay chapters now mate :)

Sadly that wont work none of the lode outs give you the nail gun :(

You know that you can chose which guns are in your loadouts right? hit the back button and scroll over to the weapons area and equip the railgun.

I don't know why people are worrying themselves with doing this at a certain spot. I did this multiple times throughout the campaign. Just play normally and use the railgun slug ammo type anytime you're approaching a room with enemies in it. Super easy to get. I used this weapon quite often and shot enemies through walls as a standard tactic. Don't bother yourself trying to find a good spot.