The Burris P.E.P.R. 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 inches of forward scope positioning. It also ensures proper eye placement -- in fact, P.E.P.R. stands for "Proper Eye Position Ready" (although it's easier to just say PEPPER MOUNT).