Made in the USA, the Superior Precision Rifle Modular Mounts (SPRM) foundation is a unibody base that cradles the optic eliminating extraneous parts and interfaces which are often traceable to loss of zero retention, or tolerance stacking and subsequent loss of interfacing accuracy. It is machined on state-of-the-art multi-axis CNC equipment from solid aircraft-grade aluminum bar stock. The SPRM mounts bring unsurpassed flexibility and utility to the discriminating user. 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. This system affords left and right sides, left and right 45-degree surfaces, as well as the top surface to be used for accessory interfaces.