The Aimpoint Patrol Rifle Red Dot Optic features rugged hard-anodized aluminum-alloy housing and a band-pass coating on the front lens for use with night vision devices (NVDs), sold separately. A transparent rear flip-style lens cover allows use of the sight with both covers closed, and the 2 MOA red dot offers accuracy at long distances. Includes a modular QRP2 rail grabber mount and a 3V lithium battery. The Aimpoint Patrol Rifle Red Dot Optic features a transparent rear flip-style lens cover and anodized aluminum alloy housing.Specifications and Features: Batteries Included: Yes Batteries Required: Yes Battery Type: 3V lithium Compatibility: Flat-top AR-15, M4 carbine and M16 rifles Finish: Matte MOA: 2 Manufacturer warranty - general: 10 years Number of Batteries: 1 Product length (in.): 5.1 Product weight (oz.): 7.8 Type: Red Dot