I've had these for quite a long time and you don't see them very often. I've also received several PMs inquiring if I was interested in selling them after posting a picture. One of them was mounted on one of my rifles at some point. I can't remember for sure but when I ordered them I don't think they were ordered as blue models. Pretty sure I purchased them around the same time but they are slightly different in length. I think I still have the boxes for both, I should take a look at them, both have a Malkoff module in them. Anyone want to take a guess when they were made.