I think that the battle rifle should be able to change from single shot to burst fire or even automatic but everyone would say that's too much like battlefield 3 blah blah blah, but this is a futuristic game, think about it I think the future should at least have a function of this type to increase accuracy for distance and the rate of fire for those close quarters situations. because we've had the technology for along time so why not use it in Halo 4 because it's in the future where technology has advanced.