Tritium Enhanced Back-up Iron Sights Meprolight is a leading International Electro-Optics company, developing, manufacturing and marketing systems for infantry, armed forces, law enforcement agencies and civilian markets since 1990. Meprolight provides comprehensive solutions with a wide array of combat-proven products; Electro-optical and optical sights and devices, night vision devices, thermal sights, laser rangefinders, hand held rangefinders and fire Control systems and other tritium illuminated products and accessories for safety and security applications. The perfect accessory for your build these Back-up sights are self illuminated for low light shooting conditions. Made from a durable fiberglass reinforced polymer these sights will a durable companion to your rifle. Specifications and Features: Meprolight Item: ML40330 Flip Up Iron Sights Mount To 1913 Picatinny Two Dot Rear Sight Tool-less Adjustment Tan Includes: Front Sight Rear Sight Fits: Any 1913 Picatinny Rail