Moore Maker contracts all of their line to other makers. At one time or another, Queen, Camillus, Bear & Sons and others have made knives for Moore Maker. The lockback (Mountain Man) is a Queen pattern, so far as I know.
Quality, unfortunately, has been all over the place. Queen, I think, has done the best by them. And before Camillus shut down, they made some nice ones too. Not so much for the knives made by Bear & Sons; a lot of folks have been disappointed with those (myself included). I bought three large double-lockback trappers from Moore Maker, the first one a few years back, made by Camillus. Very nice knife. I liked it enough, that I bought two more a few years later. Unfortunately, unbeknownst to me, those last two were the Bear & Sons version. Difference in fit/finish was night & day. Rough edges, sloppy blade play in all directions, loose lock-up, and blade edges actually RESTING against the backspring when closed, were the distinguishing hallmarks of the B & S version.