The Romeo1 Miniature Reflex Sight is the ideal sighting solution for the modern semi-automatic pistol, MSR platforms, and shotguns. It features a molded glass aspheric lens with high performance coatings for superior light transmittance and zero distortion. Manual illumination controls remember your last used settings. Extremely strong and lightweight waterproof, fog-proof aircraft grade CNC Magnesium housing ensures a lifetime of reliable service. This model has a 6 MOA Red Dot reticle.