Superior OpticsThe Vortex StrikeFire II 1x30 Red Dot Sight (4 MOA Red/Green Reticle) delivers exceptional image quality and balanced color and light transmission for high definition true-color images. The lenses are fully multi-coated with anti-reflection coatings for maximum light transmission and minimum glare. The StrikeFire II has 10 levels of brightness settings, including 2 night vision settings, to match your moment perfectly. While most red dot and holographic sights will show signs of parallax, this red dot holographic sight is virtually parallax free. The illuminated, bright red or green dot sight is highly visible in daylight. An unlimited eye relief makes target acquisition easier than ever.4 MOA ReticleThe StrikeFire II Bright Red Dot Sight contains the 4 MOA reticle that is designed create optimal target engagement in a wide range of shooting and tactical scenarios. The Vortex StrikeFire's fully-illuminated red dot is 4 MOA in diameter and was carefully designed for optimum balance between precision aiming and light visibility.The reticle has a max windage adjustment level of 100 MOA and a max elevation adjustment level of 100 MOA.Durable BuildConstructed in a compact and lightweight single-piece aluminum chassis to withstand recoil and impact, the StrikeFire is rugged and durable. A hard anodized exterior finish protects against scratches, oil, and dirt while Nitrogen gas purging creates a dustproof and shockproof body. An integrated mount quickly attaches to any Weaver or Picatinny rail.Internal OptionsThe Vortex StrikeFire II 1x30 Red Dot Sight (4 MOA Red/Green Reticle) battery provides the best life for continuous use, capable of up to 300 hours at maximum brightness and over 5000 hours at minimum brightness. The StrikeFire features a cantilever mount system that puts the optics bore center 40mm above the base.