At least that is what I believe it to be. I know nothing about it and got it in a package deal of high end target sights. To me, it appears to be unused. The lever came in the same bag as the group, but I don't know if it goes with it or not. I have no other parts for the rifle or trigger group so what you see is what you get.
I have feedback here, over 300 on GBroker, and over 700 on Calguns.