I noticed in the post about the Incisor rifle that a few people mentioned wanting the Dr. Pepper promo items. I figured I'd make a new post about them so everyone who needed could see.
You can get them for free - the codes are reusable, and no purchase is necessary. What this means is that one site posts a few codes, and everyone can use those same codes to get all three items. :> I have them on my account, and just last week I helped my dad get them on his.
This is where you get the codes and the instruction on where to put them in. Read the post, as it explains how to make a fake account (and honestly, guys, I now go by the name Aushfs Hajefbs and live on 123 Sesame Street with the phone number of 5555555555. Don't worry about it being cautious and checking you. ;D) and that you need a new account for each code. It's easy to do, you'll see once you try it.
Also, the Sentry Interface won't show up as a choice - don't panic. :> It's still available, they just removed the link. For easy reference, I copy-pasted the explanation that's in the comment section. I used this and was able to get my dad his interface, so it does work, I can assure you.
"For some reason they stopped making Sentry Interface available for download, meaning that if you were like me and hadn't got round to
downloading it yet, you'd never be able to get it. However, there is a way to cheat the system and download it. Go through the download process as per the instructions in the link above. Eventually you'll get to a screen where you select an item to download - you will only be able to choose either the Recon Hood or the Umbra Visor. To get the Sentry Interface, right click "Pick this prize" in the bottom right of the screen. Go to properties, then copy the address into your browsers address bar. Look for a part in the address that says either goodie=umbra_visor or goodie=recon_hood, and change it to goodie=sentry_interface. Then just hit enter and viola! Follow the remaining instructions and your Sentry Interface is ready to download."
I hope this helps anyone who wanted those free goodies! And I hope this was okay to share, too. :> (and that I tagged it alright)
Happy downloading!
Edit: Okay, fine then. xD Apparently they reinstated the interface just recently. I was just going off of when I last tried to get them, which was... five or six days ago. It wasn't up. Either way, though, I'll leave those instructions in case they don't show up again. ;p
Edit 2: Okay, fine then. Latest research says within the past day or two, the sentry interface is no longer able to be chosen as a "no purchase" item. In order to get it, you have to buy a Dr. Pepper and use the code on the cap (which seems like it isn't reusable). The other two you can still get for free (the hood and the goggles), but if you'd like a snazzy interface, you'll need to drink a carbonated beverage. Non-US residents? :< Uh, ebay has some codes for sale? Or bribe American friends, if you can.