I have 2, Gen 1, Sight Mark Ghost, NVG tubes up for sale. One has the attachment for your helmet and the other has the co-witness weapon mount. Both work great as I've used both on my helmet and AR. I was going to bridge them to make a budget dual tube set up but ended up getting a PVS14 in another trade. Great for observation, co-witness works well with a NVG visible red dot and with some practice you can navigate with the tube on your helmet set up. Shoot me a text and let me know what you think as these are getting harder to come by and are a great way to get into Night Vision without breaking the bank. Asking $300 each or $500 for both (helmet not included). Trade offers are welcome. Seven 2 Seven - 6 zero zero - 0 six 69