Can't tell you who made it. But I can tell you that they were imported by Kassner Imports. They offered a lifetime warranty. However, Kassner is now out of business, and so is the warranty...
I'd lay odds that it was likely made by the same firm who makes Tasco...
Saw a Tasco once that was mounted on a .44 Mag... It lasted exactly 5 shots, and then: Poof! No crosshair...
Magnum handguns are very hard on scopes... I'd buy something that I could at least get fixed.... JMHO...
GH