Hi Carlos, you got me thinking with your comments above. I decided to do some testing of my own. I do have one of these modified East German, DDR, AKM 6X3 Type I bayonets. Mine has the small points like the one pictured above. Pictures and story are posted on this Forum under "Germany" and a different heading. Mine was cheap and in a box of other used DDR bayonets.
I do not have a Russian or DDR AK74 rifle, but I do have a complete Bulgarian AK74 front barrel end I use to display how a 6X5 bayonet mounts. I grabbed my modified DDR 6X3 bayonet, a standard DDR 6X3, a standard DDR 6X4 and a standard Bulgy 6X5. I tried them on. They all mounted normally except for the standard DDR 6X3. The top of the standard 6X3 pommel interfered with the pin lugs on the bottom of the front sight base. The modified one did mount with no problem! Pictured below, top to bottom: 6X5, 6X4, Modified 6X3, Std 6X3 FAIL, (would not mount).
This answers the questions about these modified 6X3 pommels for me. I also question the need for the Hungarian version, but they did produce and sell a lot of commercial 6X3 bayonets to different countries that may have converted to AK74s. A simple and cheap modification to be able to use up surplus 6X3 bayonets. In the past other collectors have said that the ones they had did not mount on standard AK74 rifles. I believe a legitimate one would fit and that is the purpose of this modification. Nothing else makes sense. Still easy to make fakes / replicas, but they should at least mount on a standard AK74. Mike