The A3 Industries MODULAR RAIL RISERS provide various solutions commonly encountered, from correcting optic height, to increasing real estate on short handguards. Additionally, they are rigid enough to double as a carry handle. With a "bridged" riser, the original top rail can still be utilized for switch and lighting mounts, while freeing up the top rail for optics and/or NV devices.Manufactured from 6061 aluminum and hard coat anodized, the risers securely lock to the rail via the APEX mounting system. This unique system is tried and trued with extensive use on various hinge mounts, vertical grips, and other 1913 accesssories manufactured by A3 Industries.