Since DM is suppose to be hectic, why not randomize the order of the guns? each map the order is shuffled, it's the same for everyone, but you never know which gun you're going to get. knife and nade lvl will stay the same.
Also, What does everyone think of making it more than one knife to get off the level? I know it's already a little drawn out as it is but who doesn't like knifing?