BCM ORAT52510X5 A/T Optic Riser 525-10X5 Black Anodized 15 SlotsA T Optic Riser 525 10x5 is approximately 6 1 8 long and offers a cantilever section for applications where the end user desires to run an attachment or optic over the handguard while avoiding bridging the optic from the upper to the handguard. This riser has 10 recoil slots on the main body, and 5 on the cantilever section for a total of 15 slots (16 lugs). Ideal for layering magnifiers and other enhancement systems with red dot optics, BCM A T