You can do this with any vendor, but we started with Arturo in Diamond City because he sells lots of different kinds of ammunition. Travel to him, and then begin the bartering process. When you can see his list of ammunition you’ll be ready to perform the glitch.
Tip: You can use any type, but we used .308 so that we could be more specific with our instructions to you.Step 1: Buy all of Arturo’s .308 ammunition. For argument’s sake, let’s say he has 15 rounds of it. Do not press the Accept button at the bottom of your screen.
Step 2: Navigate to your side of the bartering screen and select the exact 15 round pile of .308 ammunition that you got from Arturo and sell one round of it back to him. Do not press the Accept button.
Step 3: Select the same pile of .308 ammunition that you got from Arturo, which should now show that you only have 14 rounds, and sell it all back to him. You should notice that you still have one round of .308 ammunition in that pile on your side of the bartering screen. Do not press the Accept button.
Step 4: Click on that single .308 round and sell it back to Arturo until he doesn’t have any caps left to give you. You could press Accept here and make off with all his caps, but we have a better idea. Again, do not press the Accept button.
Step 5: Navigate back to Arturo’s side of the bargaining screen and select his pile of .308 ammunition. You need to ensure that you have enough caps to buy it all. Buy it all, and then do it over and over again until it shows you that you are going to earn millions of caps, far more than Arturo can afford. Do not press Accept.
Step 6: Browse through Arturo’s inventory and buy everything you want, never pressing Accept. Seriously, buy all of his ammunition (excluding the .308 pile), junk, weapons, armor and anything else you want. It’s a really good idea to buy the shipments of various materials, as they don’t have a weight and you can use them to increase the materials you have for crafting. When you have taken everything you want from Arturo, press the Accept button to complete the glitch.
Step 7: Repeat this with any vendor in the game, using any ammunition type that you want. Also, keep in mind that our example that Arturo only had 15 rounds of .308 was just that. You will obviously see a different number when you do this. The key is to buy it all, sell one round back, and then sell the rest back. If you still show one round leftover at that point, the glitch is active and you can continue. If you don’t, leave the bartering screen and begin again.
Because we know that some of you are visual kind of people, we have embedded a video to show you this glitch working. We have seen it work on PC, Xbox One and PS4, so if you can work your way through the process, all of the caps and gear in Fallout 4 are yours. Just make sure that you do this soon (and often), because there is little doubt that Bethesda will patch it.
For more information on Fallout 4, visit USgamer’s Fallout 4 Walkthrough and Guide.