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Bronc, Thank you very much for your reply, I believe your are correct. I actually own those Bentley drawings you referenced, the problem is they do not give me the dimensions of the overall gun when mounted mounted as shown in the pictures I have attached, he just gives the overall dimension of the gun. I am trying to make a detailed replica of the guns and I think I need to know not only the overall dimension, but I would need to know the muzzle diameter as well as some of the other key measurements to do a good job.

I have found some German documentation about the layout, but nothing showing dimensions. I am also looking for documentation onlayout and dimensions of the auxiliary equipment such as the SVK2 unit shown as well.