I bought this dual mount set up years and years ago from a dealer on the Internet and I cannot remember their name. Everyone I have shown this to says they have never seen such a contraption and though one of the PVS 14‘s is kind of upside down I’ve gotten so used to using this set up that it has become second nature to me. I would like to buy another one as a spare but cannot find it on the Internet. Maybe it is just a oddball set up that was only sold for a short time. I have never had any problems with it and it has never come loose at all though it has a bayonet connection with the rhino arm. If I remember correctly I only paid $50 for it.