THE BASIC PRINCIPLES OF AK4D

HK states they do many steps in construction that are proprietary . Not handed on to licensees?So what else differs on these to make an honest clone? I know the bolt provider incorporates a scalloped notch in it, the grip frame is marked "S-P-A" as well as sights are lopped off with a longer rail on top, not to mention the Spuhr inventory and hand