Spitfire Optics Tactical Holographic Red and Green Dot Open Reflex Rifle Sight. Weaver Picatinny 20mm rail mount. Red and Green Dot Open Reflex Sight Rugged anodized aluminum housing. Shock-proof, Fog-proof. 5 brightness levels Integrated Weaver-Picatinny rail for easy mounting Unlimited Eye Relief. Anti-Reflective Coated Lens.