The FAST™ Optic Riser securely elevates direct-to-rail mounted red dot optics with a standard lower 1/3 co-witness picatinny mount to a 2.26″ optical center line. The FAST™ Optic Riser provides an elevated M1913 Picatinny platform for direct attachment of optics, such as EOTech® EXPS, Vortex® UH-1 and other lower 1/3 co-witness optics. It can be paired with any FAST™ FTC (Flip-to-Center) magnifier mount.
It comes standard with a two cross bolt rail clamp, but is compatible with the FAST™QD (Quick Detach) Lever (as of Aug. 2023).
If you’re running an absolute co-witness height optic, you need the FAST™ Absolute Riser.
FAST™ is a series of optic mounting solutions that provides end users with a quicker sight picture than standard height mounts. FAST™ mounts create a 2.26” optical centerline from the rail, which allows for more rapid visual processing of the battlefield by ensuring an ergonomically correct heads-up posture. Further, they provide faster and easier dot/reticle acquisition while wearing night vision goggles, protective masks, plate carriers and other gear.
The FAST™ Optic Riser is built from 7075-T6 Aluminum and is Type III Hardcoat Anodized in Black or FDE*.
HEIGHT:
2.26″ to Optical Centerline
COMPATIBILITY:
All Direct-to-Rail Mounted Optics. Optimized for Lower 1/3 Height Optics.
If you’re running an absolute co-witness height optic, you need the FAST™ Absolute Riser.
MOUNT TYPE:
2 Cross Bolt Rail Clamp
FAST™ QD Lever Compatible as of Aug. 2023 (Sold Separately)
DIMENSIONS (W X L X H):
IN: < 1.4 X 3.6 X 0.8
CM: < 3.6 X 9.1 X 2.0
WEIGHT:
OZ: <3.0
G: <85.0
MATERIAL:
7075-T6 Aluminum
COATING:
Type III Hardcoat Anodized
NOTE: “FDE” is used throughout our catalog to reference a spectrum of colors that include tan, brown, bronze, earth, and everything in between. Due to the chemical process that takes place during Type III Hardcoat, the final finish can vary from part to part (even parts done in the same batch). Therefore, your “FDE” product may vary from other parts from UNITY and other companies, and may vary from the photos shown online.





kenaiking (verified owner) –
Well built and makes my Eotech the perfect height!
Benjamin (verified owner) –
Liked it so much I bought a second one to use with an MRO mounted on a lower 1/3 ADM qd mount and it sits at a much more comfortable height, good stuff and always super fast shipping from BTO!
battenfield.daniel (verified owner) –
Easy to use and makes eotech exps so much more comfortable
Benjamin (verified owner) –
Quality mount, perfect height for Eotech EXPS, just wish it came with QD instead of having to buy it separately.
jdutt24 (verified owner) –
I was on the fence until arrival and install with an eotech EXPS3-0. Went out to re-sight and *instantly* figured out the hype is legit. Height isn’t an issue and felt comfortable with my egg-shaped head. Ha. Later when the sun went down, back outside I went and used under my 31a’s and in every way night vision shooting and passive aiming was a dream. Get one for each of your dedicated nvg guns, you’ll be impressed and neck/shoulders less fatigued.