@BillRM,
BillRM wrote:An there is only repeat only one purpose of having a pistol grip on a rifle and that purpose is to keep it from climbing when you are firing it in rapid mode.
Even if it is true that pistol grips help to control full-auto fire (a point that I am neither agreeing nor disagreeing with, for the record), that has nothing whatsoever to do with the semi-auto-only guns that we are talking about here.
Besides, I can think of a different reason for having a pistol grip on a rifle. It allows the gun to be used with an adjustable stock. So even if your stated reason is one reason (again, a point that I am nether agreeing nor disagreeing with), it certainly isn't the only reason.