EOTECH XSP2-FN EOTech created the XPS2-RF specifically for the non-tactical traditional rimfire or air rifle platforms. This light streamlined holographic weapon sight makes rimfire shooting easy and fun. The EOTech sighting system offers an incredible advantage to people with aging eyes. The large viewing window and illuminated holographic reticle make getting on target fast and easy. A Youth Shooter can really appreciate the reduced weight of this optic as well as the rugged durability. Beginning and experienced hunters of all ages should look to the XPS2-RF for small game hunting high-speed target shooting and plinking. - The XPS2-RF only fits the 3/8 (11 mm) dovetail rail with no cross bolt; and does not work with 1 Weaver or Picatinny rails. - Night Vision-Compatibility: None - Length/Width/Height: 3.8 x 2.1 x 2.3 - Weight: 7.0 oz - Water Resistant: Yes - Mount: Only 3/8 (11 mm) Dovetail with no cross bolt; does not work with 1 Weaver or Picatinny rails - Power Source: One 123 lithium battery - Battery Life: Appx 600 continuous hours at nominal setting 12 at room temp