after i turned in the gun for the first curse quest my primary slot went empty and when i looked a auto file replaced the spot but with no name or picture in the slot appeared, after that i went in a crucible match and tested it out, then for the rewards i had gotten a hand cannon which replaced the mysterious auto rifle and it was gone , bungie you might want to look in to this glitch / bug, but was interesting to find and hey i guess you learn something new every day. P.s i did nothing to make this happen.