If you get a preban FEG, and an AMP-69 parts kit, I believe you could have yourself an exact, all hungarian copy! I am waiting to hear back from my friend who has a post sample AMP-69, on barrel length, Tokoi measured it at just under 16 inches, but I am not sure where he measured from... AMD-65 is SBR for sure.
The stocks are different on the two (69 is spring loaded), receievers identical, but the barrel assemblies are quite a bit different, the 69 having gas cutoff and a spring loaded lower HG (same gas tube though).
Campy, the AMD-63 is the fixed stock, full length, dual pistol grip AKM (wood or white plastic furniture), the AMD-65 is your SBR dual p-grip, folding stock 'crowd control' AKMS (seen extensively in Rambo 3 as a Russian Spetsnaz gun), and the AMD-69 is the grenade launching variant pictured above...
-C