I have a friend who wants to try a gen 4 dual RSA in his gen 3(I have no idea why). Is this even possible? I have found a conversion for the Gen 4 to use the earlier generation springs but not the other way around. I know the ends of the gen4 and gen3 RSAs are different I've searched for the answer but I haven't been able to find anything. My friend is convinced my gen 4's recoil is infinitely smoother than his. I think there is only a small difference, but I thought I'd humor him and see if I could find the answer. So any help would be appreciated.