The basic RIA GI that the OP is looking at does have standard, GI-type sights. The front sight is a narrow tenon base, and the rear sight uses a standard, GI dovetail. The sights for which you show the drawings are for the RIA Tactical model. While those sights are not standard GI cuts -- they are also quite decent sights and don't need to be replaced unless you want night sights.
It is my understanding that the RIA GI is not a standard GI cut. Do you have verification that it is a standard cut? I am curious. There is a lot of conflicting info. If it is it will help because the cost to stake and install a new set without milling is cheaper and easier.
As you and I stated the Novak style sights on the Tactical are not standard. There is a lot of back and forth about the cuts on these guns. I was just pointing out that if you go the tactical route then if you want to change the sights later you might have to mill them as well.
The OP has been going back and forth on which gun he is going to purchase. I agree 100% that if he gets the tactical there is no reason to swap them out. The sights and the other upgrades make the Tactical a better buy IMHO which I illustrated in his/her other thread.
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