Are you talking about the gap that runs the length of the frame/slide? This is a design gap and just part of the fit/finish of the gun. But there was a batch of P99s that had some warped frames were the front of the frame drooped at the muzzle...gap there was more pronounced. That would have to be taken care of by WaltherAmerica. Some people actually received a new frame.Hey guys wandering if you all know how I could possibly decrease the space between the slide of my p99 and the frame itself...there is a slight gap that sort of bothers me...thanks for yalls help