The Holosun 509 Lower 1/3 Picatinny Rail Mount is a durable and precision-engineered mounting solution designed to provide a lower 1/3 co-witness with your Holosun 509 optic and iron sights. Constructed from CNC-machined 6061 aircraft-grade aluminum with a Type III hard-anodized finish, this mount ensures durability and resistance to recoil, rough use, and harsh environments. Stainless steel Torx head M3 screws secure the mount for a snug, wobble-free fit, enhancing stability and accuracy. Designed for seamless integration with Picatinny rails, this mount offers an expanded field of view and dependable performance. Backed by a limited lifetime warranty, it guarantees long-lasting reliability.