Perking the Osty is a bad idea, The Wilberwind would IMO be a much more feasome weapon, deflection shoting would less of a chance occurance, and a far greater effective range and hiting power than the M16 would be a force to be reckoned with.
The only thing that curently makes GV's a viable option in AH is the Osty, if you take it away or perk it their will be a drastic side effect on GVing in AH.