FAST™ is a series of optic mounts and platforms that provide end users with a quicker sight picture than standard height mounts. A 2.26” optical centerline height provides faster/easier reticle acquisition while wearing electronic ear pro/communications headsets, night vision goggles and protective masks, and allows for more rapid visual processing of the battlefield by promoting a heads-up posture. A heads-up posture also helps users maintain a neutral spine position which is more comfortable while wearing helmets, plate carriers and other heavy gear.
FAST™ Absolute Riser securely elevates block-type red dot optics with an absolute co-witness height to a 2.26″ optical center line. FAST™ Absolute Riser provides an elevated M1913 Picatinny platform for direct attachment of optics, such as EOTech® XPS®, Leupold® LCO® and other absolute co-witness optics.
If you’re running a lower 1/3 co-witness height optic, you need the FAST™ Optic Riser.
The FAST™ Absolute Riser comes standard with a rail clamp and is compatible with our ADM QD lever kit (sold separately). The FAST™ Absolute Riser is built from 7075-T6 Aluminum and Type III Hardcoat Anodized Black or FDE*.









Carlos (verified owner) –
Great price and service. Got it to try the FTC craze.
Chase Guisinger (verified owner) –
Quality and function are great. Would still like a little more height under nods but overall great product
ojuelle89 (verified owner) –
Was a bit skeptical at first about the height, but you get used to it, now that ive used it a lot, i really like it and makes a ton of difference.
dkmoya73 (verified owner) –
Typical high quality product from Unity!
Sturdy and durable, provides the head up shooting platform, makes those extended range days far more comfortable.
Great service from Big Texas as well.
LS (verified owner) –
Night and day difference, even over a 1.93 mount!