Hi Mark!
Based on the information provided itâ??s impossible to say what this one might be - other than a rebuild. Some pictures might help :-)
Ugly plastic grips are frequently found on the Lugers imported from the CIS. A replaced barrel is common enough, and this could have been done here in the States (Is the barrel proofed? If so how?).
That said, this one doesnâ??t sound like a VoPo. It might be an East German rebuild, but not a Volkspolizei pistol. To be identifiable as a VoPo pistol it must have, at the very least, the sunburst with a shield and number that would indicate it has been Volkspolizei inspected and accepted. It should also have the wreath "A. B. nn" stamp (where â??nnâ? is a two digit number) indicating acceptance by the Abnahmebauftragten (Acceptance Official/Agency). Here are pictures of representative examples of these stamps.
Volkspolizei Inspection & Acceptance Stamps
Hope this helps some!
Warm regards,
Kyrie