BCM ORAT5255 A/T Optic Riser 525-5 Black Anodized 5 SlotsA T Optic Riser 525 5 is approximately 2 1 8 long and is intended to be used with a red dot or other single optic or accessory. This riser has 5 recoil slots (6 lugs). All of our risers are the same 0. 525 of rise over the top surface of the upper receiver. Ideal for layering magnifiers and other enhancement systems with red dot optics, BCM A T Risers offer the potential for a more capable platform that can improve threat identification in complex