It took me a year to read the last one, so no hurry. I kept starting over to make sure I didn't miss anything, and I read nearly every chapter 3 or 4 times. Information overload.
That's not a correct muzzle cap(which doesn't affect the gun), the lower band is on backwards, and the sight slider is wrong, too. Other than that, it's a nice rifle.
Most of the caps I see were apparently made for somebody with a head the size of a softball. Maybe that's why they weren't issued, or maybe the Germans were drafting pygmies.
They probably had a real shortage of skilled machine operators, also. Slave labor is passable for mining coal, digging ditches, etc., but lathe operators have to know what they're doing.(and want to do it right)