The Trijicon ACOG Thumb Screw Assembly (RCO-M150) AC12008 is engineered to provide a secure and stable attachment for your ACOG scope on M150 models. Constructed from high-quality materials, this thumb screw assembly offers durability and reliability in various conditions. The slotted head design allows for easy adjustments, ensuring your scope remains firmly in place. This accessory is perfect for shooters seeking precision and stability in their setup.