I have three Matech BUISes, which I don't have a picture for, but they're the standard issue "hole in a Popsicle stick" backups that the army and marines use. Elevation-adjustable for 200, 300, 400, 450, 500, 550, and 600 meters. Nice little piece of equipment. Being unofficial platoon armorer at infantry school has benefits. Give me some offers.