The Burris P.E.P.R. (Proper Eye Position Ready) mount has become the absolute go-to mount of choice for an incredibly solid, long-lasting cantilever mount. It makes mounting an optic to an AR-style rifle very easy, providing the necessary clearance and adding as much as 2" of forward scope positioning. It also ensures proper eye placement. The P.E.P.R. Mount is a perfect AR or flattop mounting solution.