I would appreciate any help I can get in identifying this magazine. It fits the Daewoo DP 51, but extends slightly beyond the grip. I know that some S&W mags will fit the Daewoo, but don't seat flush. The mag I got with the gun does not look like any of the mags I have for my S&Ws. The butt plate says Pachmayr, but I think this may be an add-on.
Here are some pictures.