The Trijicon ACOG Extended Eye Relief Picatinny Rail Adapter with Colt Knobs AC12019 is designed to provide a secure and stable attachment for your ACOG scope. This adapter features extended eye relief, allowing for comfortable and precise aiming. Made from durable materials, it ensures long-lasting performance and reliability. The Colt knobs provide easy installation and removal, making it a versatile choice for various shooting applications.