April 22nd, 2016, 09:12 AM
Join Date: Jul 2007
Location: Cascadia Fault Oh-my!
Everything about the parts and the way it's constructed look correct.
When comparing your pictures to M6's I have, the tang peen on the pommel of your knife looks very similar to an Imperial I have. Not saying that makes them from the same source, just making that observation.
It could be that the guard just missed getting stamped and wasn't noticed, (this does happen when thousands of items get assembled), or possibly there was a deliberate reason for it not having the normal markings. Otherwise it looks like it was made by one of the M6 contractors.