Tomio at Shoei has written an article covering the differences between the various WW"2 models they lovingly create:
Dear Friends,
Thank you very much for your continued patronage.
The other day, I told you about sale of MP44 series model gun. And several friends asked me about the difference between MP43/1, and MP44 and StG44.
I got cooperation of many friends and updated our website today by the data in which the difference is shown.
Please check our website. http://www.shoeiseisakusho.co.jp/
and http://www.shoeiseisakusho.co.jp/MP44%20series%20english.html
If you have any questions or need further info, please feel free to contact me any time.
I am looking forward to receiving your order soon.
Thank you always.
Greetings from Japan.
Best regards,
Tomio, (Shoei Seisakusho Inc., Japan)