Ok, before I sent the Knock-off back to LaRue I took some pictures for comparison. I hope this helps people spot a FUG knock off in the future, however, I learned my lesson and Mark won't be around to bail me out next time, so I recommend ordering directly from LaRue. I am a pretty shitty picture taker but I tried to do my best. I don't have a micrometer or else I would have take some precision measurements.
In the following pictures, the FUG is on the left and the Impostor is on the Right.
Let me first say that if I didn't have a real one to compare to, I would have thought the impostor was a real FUG. I knew the there were knock-offs out there but the tell-tale sign was the orange o-rings but either someone switched out the rings or the Chinese are getting more sophisticated. I didn't even think about asking the seller about anything other than the o-rings
and I didn't even think about other markings that could be used to distinguish the real from fake because, to tell you the truth, I didn't know what other markings existed. I am always told at work to have a questioning attitude (and too often I bring work home with me) and that is when I started studying the pictures on LaRue's website and noticed the markings on the mount. It looks just like the pictures I have seen from different forums becuase you can't see the other markings when it is mounted to the rail. It is only when you have the two side by side you can tell the "cheapness" of the impostor and really notice the differences.
The first thing that made me question the impostor was the lack of the stamp on the top of the FUG, meaning "USA", "LT690" and "Patent Pending." I thought that it was a possibility that in order to push out FUG's faster that maybe they didn't stamp it and that is why I started the thread to get some input.
Right out of the box you can tell the quality of the FUG. The lines and tooling were nice and clean compared to the impostor. The LaRue stamp with the state of Texas were clean and not rounded like the Knock-off. There was a noticeable difference between the weight of the two. Using a kitchen scale. I measured the FUG and the Knock-off with the flat bottoms on them.
The FUG weighed in at 4.6 Ounces.
The Impostor weighed 3.6 Ounces.
I want to thank you Mark and your staff for all the help and for replacing the impostor, God Bless LaRue Tactical. Not only did you give me a "bail out" but also included some free swag with the FUG and LT-606 rings!