BOXR4LIFE

I was playing a game of dominion just a few moments ago and CASH 3YE not only was able to shoot directly through a wall, but he had at least 6 shots in a rocket launcher before reloading as well as around 40 using a dmr without reloading. I am unsure as to whether this is a major glitch within halo or whether he was hacking, but either way i am not very impressed!!! I want this issue resolved asap please