A/T Optic Riser 525-13x5 is approximately 7-1/4" long and is intended to be used similarly to the 525-10x5 but offers 3 additional recoil slots for more flexibility. This riser has 13 recoil slots on the main body, and 5 on the cantilever section for a total of 18 slots (19 lugs). Optimized for close combat ranges, the BCM A/T Riser creates a platform that raises the centerline of attached optics and magnifiers by 0.525 inches which raises typical lower 1/3 optics to approximately 2.16 inches height and absolute co-witness optics to approximately 1.93 inches height. This additional height enhances the trained end user's situational awareness, and further, makes it possible for them to take better aimed shots if they are using the optic in conjunction with night vision or other PPE systems.