Great monocular for price - Armasight Sirius ID MG Gen 2+ Night Vision Monocular with Improved Definition

This is a great monocular for the price. I also own a PVS-14 3A which is obviously better, but it also cost 3X as much. Unless you plan to use a NV monocular a lot so that long tube life is important or to save your life, this one works fine.

I agree with others that the MUM-type mounting flanges are a pain in the neck and require more expensive mounts. I adapted one of the flanges to use another brand weapon mount that uses Aimpoint Twist Mount bases, but found that, because of the large mounting screw underneath it, it must be elevated an additional 1/2" to clear a fairly flat rear BUIS.