The ROMEO5 compact red dot sights provide civilians and armed professionals a robust 1x aiming solution for any situation. Ultra-low parallax so point of aim is point of impact and the red dot remains parallel to the bore of your firearm, no matter what your viewing angle is relative to the optical axis of the sight. Unlimited eye-relief allows you to acquire the aiming point and the target regardless of the position of your eye behind the sight. The battery is side-loading, allowing for quick battery replacement (with 40,000+ hours or more of life). Dependable waterproof (IPX-7 rated for complete water immersion up to 1 atmosphere))and fog-proof performance. Features- 2 MOA Red Dot provides 10 illumination settings (8 daylight plus 2 NV) for visibility in all light conditions, MOTAC (Motion Activated Illumination) powers up when it senses motion and powers down when it does not and an integrated M1913 Picatinny interface provides industry-standard mounting options for a wide range of applications. Includes a M1913 Picatinny low mount riser and a co-witness 1.41" riser mount