Chinoook 4-12X50 EG Tactical Rifle Scope with Holographic 4 Reticle Sight & Red Laser JG8 Easily mountable to any 20mm rails (Picatinny or Weaver) Integrated rails offer ample space for accessories Tubeless holographic sight with 33mm reflex lens aperture provides a wide field of view, suitable for normal and rapid-firing shooting of moving targets Weather, fog, and shock proof Detachable red laser sight with separate switch