This Riser securely elevates block-type red dot optics with a standard lower 1/3 cowitness picatinny mount to a 2.26" optical center line. FAST Riser provides an elevated M1913 platform for direct attachment of optics such as 551 552 553 558 556 EXPS, Leu-pold LCO, Vor-tex and other "lower 1/3" optics.
Technically, the Riser will support "absolute cowitness" optics such as EO-Tech XPS, Romeo8H, etc.
