Griffin Armament SPRM Scope Mount/Ring Combo Black Anodized Cantilever 34mm Tube 1.43" Mount Height 15 MOA Aluminum Tactical Rifle The Superior Precision Rifle Modular Mounts (SPRM) foundation is a unibody base that cradles the optic. Left-handed or right-handed shooters are equally supported with the SPRM mounts and accessories. The Rapid Transition Optic (RTO) plates position secondary non-magnified optics on optical centerline relationship with the stock comb for comfortable, rapid, targeting with a simple roll of the host firearm. These plates currently support: Aimpoint Acro, T1/T2, H1/H2, Comp m5, Sig Romeo, Vortex Spark, Trijicon RMR , SRO, Holosun HE507C HS407C, HS508C, Leupold Deltapoint, J point, Optima, Dr optic, Meopta, Insight microdot, Burris Fastfire, vortex venom, and viper, CMORE STS, RTS, STS2, and vortex razor. The SPRM allows for the incorporation of the Accessory Interface Suite (AIS) of products, which brings ambidextrous modularity and universal accessory support. The unique patent-pending design splits the rings on two parallel but offset planes allowing accessories to be mounted on 5 AIS mounting surfaces.