The Sightmark Wolverine FSR Red Dot Sight is a close-range optic designed specifically for shotguns and short-barreled rifles. The FSR sports a 4 MOA red dot reticle with a 23mm objective lens and adjustable digital switch brightness controls. Compact and lightweight, the FSR weighs just 10.3 ounces and boasts extremely low power consumption, with 1,000,000 million hours battery life on low power and 50,000 hours on setting 6 from just a single AA battery. The CSR also offers variable brightness and night vision modes, which enables the ability to co-witness with a night vision sight. The responsive Wolverine sights are housed in a single piece of 6061-T6 aluminum that is rubber-armored and protected by a scratch resistant, anti-reflective lens coating. Fog proof and nitrogen purged, the FSRs are designed to provide shooters the ability to take aim in a variety of conditions and temperatures ranging from -22 to 122 F. The Wolverine was built to adapt and is ready for anything. All Wolverine models sport an IP67 waterproof rating and are water submersible to three feet. Wolverine red dot sights have an adjustable mount height and are compatible with Picatinny mounts.