Rail mounted Shadowstalker Mk. II zoom scope.
The item id for ShadowstalkerMk2 Scope in unturned is 1442. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Size_X: 1
Size_Y: 1
Size_Z: 0.2
Spread: 0.7
Zoom: 20