Quote Originally Posted by CarlosDJackal View Post
As was stated in the original post, the Police extractor is Parkerized and goes through more of a QC process which brings it's overall price up a bit.
The difference is (or at least used to be) that the Police/Wingmaster extractor was machined from barstock whereas the Express part was MIM. I have no idea if either or both is parkerized but that's just a finish in any case.