User blog comment:GandalfTheGray1/Weapon Farming and Experience Farming/@comment-5315662-20120805030107

if you have finished DLC3, there is a mission called Super-Marcus-Sweep that lets you go through the armoury again and if you know about the armoury glitch, ( this video details it very well, http://www.youtube.com/watch?v=MpwaB_ivxN8&feature=related) then you can endlessly loot the armoury. As for xp farming, do missions from bounty boards that offer lots of xp.