The A/T optic riser 525-13 measures approximately 5.75 inches in length and spans the entire upper receiver, providing one additional recoil slot compared to the upper receiver itself. It features 13 recoil slots (with 14 lugs in total), offering users flexibility in spacing when mounting sights, NVG (night vision goggles) or thermal devices. Designed for layering magnifiers and other enhancement systems alongside red dot optics, BCM A/T risers enhance the capability of your platform. They enable configurations that can improve threat identification in complex environments, making your setup more versatile and effective for tactical applications.