SPRM mounts allow the incorporation of the Accessory Interface Suite (AIS) of products, which brings ambidextrous modularity and universal accessory support to the precision optics mount marketplace. 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. The GRIFFIN 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.A heavy emphasis on anatomically correct positioning of optics was placed on AIS products, leading to the development of the RAPID TRANSITION OPTICS plates. RTO plates position secondary non-magnified optics on optical centerline relationship with the stock comb for comfortable, rapid, targeting with a simple roll of ...