Holosun Technologies 509 Adapter Lower 1/3 Mount Fits Picatinny Black. Crafted In Sleek Black This Adapter Provides A Secure And Stable Mounting Solution For Your Optic On A Picatinny Rail. The Innovative Design Ensures A Lower 1/3 Co-witness For Improved Sight Alignment And Accuracy. Made To Last This Mount Is Built To Withstand Rugged Conditions And Deliver Reliable Performance When You Need It Most. Elevate Your Shooting Setup With The Holosun 509 Adapter And Experience The Precision And Quality That Holosun Technologies Is Known For. Specifications for Holosun 509 Adapter Plate For Picatinny Lower 1/3 Cw: Manufacturer: Holosun Color: Black Fabric/Material: Aluminium Co-Witness: Lower 1/3 Red Dot Sights-Footprint: Holosun 509T Gun Rail: Picatinny Package Contents: Holosun 509 Adapter Plate For Picatinny Lower 1/3 Cw