Solved
Missing Item from Battlepack
I received and opened a Mare's Leg Battlepack while in game, and received three items. Instead of a fourth item, I was given a "STANDARD Missing Item - An error occurred while retrieving your items...
Unfortunately, the Mare's Leg has a glitch that you do not get all the attachments. There is nothing that can be done to fix this besides a patch from DICE and I know they won't be fixing it.
