Everything that I have read says that in order to mount an Aimpoint on the forward carry handle mount I must use the railgrabber. However, when I ordered my aimpoint and carry handle mount from SWFA they said that the 30mm extra wide ring would serve the same function except it just wouldn't be quick release. I am not doubting SWFA's expertise but I just wanted further clarification that this is the case. Will it be the same height? Is there any functional difference between the two except for the quick release feature of the Railgrabber?