Both the Couriers Stash & Gun Runners Arsenal has been released onto the Xbox Live Arcade, making this the last DLC to be released for Fallout: New Vegas.
The Couriers Stash is 160MSP and it offers players the chance to access the content packs that were only available for the game via pre-order, if you set your mind back those packs were, The Caravan Pack, Classic Pack, Mercenary Pack and Tribal Pack. Each pack also came with its own unique clothing and weaponry not to mention certain items to heal your character with.
The Gun Runners Arsenal Pack is 320MSP and the pack increases the range of unique weapons that you will be able to find throughout the wasteland. Not only will you find weaponry though you will have the chance to find weapon mods and different ammo types to play around with.