The only MP 44 series weapons made post WW 2 are the semi-auto commercial versions currently being made in Germanicon and the US. There have Not been any of the select fire weapons made by anyone since the end of WW 2.
There are probably 10+ countries that have used WW 2 weapons in the past 70 yrs and several 3rd world countries that may still be using them. NONE of these are of post war mfgr!
As I have said previously - about every part will have a ser nr except front sight assy, sight hood, hand guard u. firing pin. Some bbls will and some will not have a ser nr.
Here is a photo of some of my 44s and extra parts.
Attachment 59648
Sarge