DWM upper value?

[Jim Mac]

I want to thank Don Voigt, he had a complete lower available and since I couldnt just leave a complete upper well enough alone. I broke open the piggy bank and went and bought it. Even though thebupper and lower doesnt match, its still a luger! And a complete one at that.
So a question for you guys.....
how does a upper become seperated from a lower? The gent I bought the upper from had two matching uppers and no lowers. Don had a matching lower. I see lugers for sale with uppers not matching lowers. I was just curious. Jim