This is a Survive Knives GSO-4.5. You can visit [this page] for more information on the knife. I bought it a while back when I was studying mid-tech knives.
It is marked as a "factory second", but I haven't seen any defects worth noting. It is unused. I'm listing it up for less than what I paid a couple years ago.
Manufacturer: Survive Knives
Steel: CPM 154 stainless
Handle Material: green canvas micarta (aged to a dark olive)
Sheath: black kydex