Due to an error at my store (and an awesome manager who was working at the time), I got an extra set of redemption codes when I picked up my Halo 4 pre-order. Because one part was missing, he printed a whole new set of codes for me, repeating some of the ones I did get. So he just said "give them to a friend, or something". So here I am!
Anyway, here's the stuff:
Forest Armor for use in Multiplayer:
H3XQG - YCT4Y - TQQ3D - KQWMX - X3C4Z
Arctic Battle Rifle Skin:
Q2KC3 - 3RCC9 - YPPK6 - RVJF6 - 2G3FZ
War Games Haven XBL Theme:
XM2MH - GG2D6 - JGHX4 - 6MXP3 - RGJGZ
Xbox Live Ghost Avatar Prop:
4FH2T - FYDDC - YXTHC - 6MQM4 - QW94Z
I figure if there's anyone out there who benefits from extra codes, it's this community. So enjoy!