The SMS is the smallest, lightest and toughest mini reflex sight for military, law enforcement and sporting arms and has seen use in organizations like the British Army and Special Forces as well as special operations units operating under the US, Australia, New Zealand and other NATO countries. The SMS features an all-polymer design along with a IP67 waterproof rating and boasts a 20,000-hour operational life on a single CR2032 battery. A hard-dipped, filter-less acrylic lens provides color free distortion ensuring a crystal clear sight picture. This model features an all-black color pattern and utilizes a 4 MOA red dot. It is compatible with slides and adapter plates matching the SHIELD SMS footprint. One 3V Lithium CR2032 battery is included.