A/T Optic Riser 525-13 is approximately 5-3/4” long and covers the entire length of an upper receiver and offers one more recoil slot than the upper. This riser has 13 recoil slots (14 lugs). It can be used with any combination of sights, NVG, or thermal which would fit on an upper receiver and the additional slot gives the user some spacing flexibility.
code:
bcm-or-at-525-13