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Unity Tactical LLC FSTRAB Fast Absolute Riser Black Anodized
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$99.99
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SKU: FSTRAB-810007881140
Overview
Built for shooters who want to raise an absolute co-witness red dot to a 2.26 optical center line, this riser creates a higher M1913 Picatinny mounting platform for direct optic attachment. It is designed for block-type optics such as the EOTech XPS and Leupold LCO, and it can also be used with FAST FTC magnifier mounts. The included two cross-bolt rail clamp provides the standard mounting method, while compatibility with the FASTQD lever adds another setup option. For hunters and field users building a compact optic system, it offers a straightforward way to position compatible sights at a higher sightline without adding unnecessary complexity.
Why Hunters Choose the Unity Tactical
Raises Block-type
Red dot optics to a
Elevated M1913
Picatinny platform for direct optic
Compatible Absolute
Absolute co-witness optics including EOTech
Can Be
Any FAST FTC flip-to-center magnifier
Includes Two
Cross bolt rail clamp and
Key Features
- Elevates block-type red dot optics to a 2.26 optical center line.
- Provides an elevated M1913 Picatinny platform for direct optic attachment.
- Designed for absolute co-witness optics, including EOTech XPS and Leupold LCO.
- Compatible with FAST FTC (Flip-to-Center) magnifier mounts.
- Includes a two cross bolt rail clamp and works with the FASTQD lever.
- Made from aluminum and measures 3.60 inches long.
Best Used For
- Hunters using absolute co-witness red dot optics on a Picatinny rail setup
- Users pairing an optic with a FAST FTC flip-to-center magnifier mount
- Shooters wanting a 2.26 optical center line for elevated optic placement
- Anyone needing direct attachment for EOTech XPS, Leupold LCO, or similar optics
Specifications
| Co Witness Height | Absolute co-witness |
|---|---|
| Color | Black Anodized |
| Compatible Mount | FAST FTC (Flip-to-Center) magnifier mount |
| Compatible Optics | EOTech XPS, Leupold LCO and other absolute co-witness optics |
| Fastqd Compatibility | Compatible with FASTQD (Quick Detach) Lever |
| Length | 3.60" |
| Material | Aluminum |
| Model | Fast Absolute Riser |
| Mount Type | Picatinny Rail |
| Optic Center Line | 2.26 |
| Pieces | 1 |
| Rail Clamp | Two cross bolt rail clamp |
Pros
- Raises block-type red dot optics to a 2.26 optical center line.
- Provides an elevated M1913 Picatinny platform for direct optic attachment.
- Compatible with absolute co-witness optics including EOTech XPS and Leupold LCO.
- Can be paired with any FAST FTC flip-to-center magnifier mount.
- Includes a two cross bolt rail clamp and supports FASTQD lever compatibility.
- Compact 3.60-inch Picatinny rail riser in black anodized aluminum.
Considerations & Trade-offs
- Designed for absolute co-witness optics, so it is not a universal solution for every red dot setup.
- Adds a 2.26 optical center line, which changes sight height and may require a different shooting position than a standard mount.
- Ships with a two cross-bolt rail clamp; using the FASTQD lever requires the separate compatible lever setup.
- At 3.60 inches long, it provides a compact mounting platform rather than a full-length rail section.
Suggested Comparisons
- Red dot optic risers
- Picatinny rail mounts
- Magnifier mounts
- Optic mounting accessories
Suggested Accessories
- Picatinny rail accessories
- Flip-to-center magnifier mount
- Quick-detach lever
- Optic mounting hardware
Frequently Asked Questions
What optics is the FAST Absolute Riser designed to work with?
It is designed for block-type red dot optics with an absolute co-witness height, and the description specifically mentions direct attachment for optics such as the EOTech XPS and Leupold LCO, along with other absolute co-witness optics.
What height does this riser place the optic at?
The product states a 2.26 optical center line.
What mounting system does it use?
It provides an elevated M1913 Picatinny platform and is listed with a Picatinny rail mount type.
Can it be used with a magnifier mount?
Yes. The description says it can be paired with any FAST FTC (Flip-to-Center) magnifier mount.
What comes standard with the riser, and is there another clamp option?
It comes standard with a two cross bolt rail clamp, and it is compatible with the FASTQD (Quick Detach) Lever.