I think I might have seen a legitimate hack for the first time on BO 2. I played a few games last night with a player and his guest that were firing guns with no recoil. The 2 that a noticed were a customized MK-48 with a variable zoom scope and an FAL. The FAL I'm not so sure about as the recoil on those isn't too bad anyway... but the MK-48 was ridiculous. I'm very familiar with the MK and it's recoil (or lack thereof) shouldn't have been possible. Figuring that it was some weird attachment combo I tried picking it up, but it acted just like any other MK-48 for me.
Has anyone else seen this or know of anything like this? Obviously hacks on the Xbox are extremely rare, but they're out there. All I could find on YouTube were PC hacks, but after watching those videos it was the same as what I saw last night.