When you need to transition from close range engagement to mid-range precision without putting extra weight, the XTM-3 Magnifier is the right tool for you. Sightmark offers the lightest, most compact magnifier in the market today. Weighing only 8.1oz, this 3-inch long magnifier has an 18mm objective lens and provides 3x magnification to a wide variety of rifle-mounted red dot sights. Outfitted with a no-nonsense flip-to-side mechanism as well as a simple locking quick detach mount, the XTM-3 is designed with practicality and ergonomics in mind. Constructed with shockproof 6061 aluminum housing with an IPX7 waterproof rating and a nitrogen-filled chamber to eliminate fog, the XTM-3 Magnifier is a quality magnifier that's built to last.