If it is the later receiver, and a study of the FAQ's will tell you how to discern the difference if you aren't already familiar, it is an upgrade. I have a Shikari barrel in 44 Mag on a later receiver, love it. No safety concerns if it locks up nice and tight. The underlug on the Shikari's is silver soldered, not welded, but on a 44 it should never be an issue.