Same reason why dw617s A1 clone would be DQ for cmp service rifle. ? All very confusing Like i said before maybe the cmp is trying to get MM to actually be modern or some what ad the M4 pushes 15 years old now. So basically it sounds like they dont want 20" barrels in the AR MM ? Ok so why no M16a1 A2/A4 M4 classes? Im stumped.