







FAST™ OFFSET OPTIC BASE (36° Secondary Mount)
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Customers from Taiwan can make purchases at PTS Steel Shop (Taiwan) / Ruten - PTS Steel Shop, while those from the United States can visit PTS (USA).

Unity Tactical FAST™ Offset Optic Base: Rapid Engagement for Secondary Optics
The FAST™ Modular Accessories Suite offers multiple solutions for attaching secondary optics or BUIS to compatible FAST™ mounts. The FAST™ Offset Optic Base bolts directly to the primary FAST™ mount, creating a dedicated platform for micro red dot sights.
When paired with a FAST™ Optic Adapter Plate (required for function, sold separately), the Offset Optic Base provides a robust mounting solution for micro red dots, enabling users to transition quickly to a secondary aiming system.
Key Advantages and Tactical Function
- 🚀 36-Degree Offset: The base positions the micro red dot sight at a 36-degree angle from the centerline of the primary optic mount. This facilitates a swift and seamless transition between the primary magnified optic and the secondary non-magnified red dot for close-range engagements.
- Unified Sight Line: When used with an Optic Adapter Plate, the micro red dot achieves a mechanical centerline of 2.05 inches above the rail, maintaining the consistent, heads-up shooting posture characteristic of the FAST™ system.
- Highly Modular: Compatible with all Optic Adapter Plates in the FAST™ Modular Accessory Suite, allowing for diverse micro red dot integration.
- Premium Durability: Constructed from rugged 7075-T6 Aluminum and finished with a Type III Hardcoat Anodized coating (available in Black or FDE*), ensuring mission-critical reliability.
Installation and Compatibility Notes
- Fixed Orientation: The FAST™ Offset Optic Base will always sit on the right side of the FAST™ mount (shooter's right) when the mount is oriented forward on the M1913 rail.
- Compatibility: Compatible with all FAST™ mounts for red dots and magnified optics. NOT compatible with FAST™ FTC Magnifier Mounts.
- Requirement: Requires a FAST™ Optic Adapter Plate for full functionality.
Specifications
| Specification | Value |
| Material | 7075-T6 Aluminum |
| Coating | Type III Hardcoat Anodized |
| Offset Angle | 36 Degrees (from centerline) |
| Final Height (w/ Adapter) | 2.05in above rail (mechanical centerline) |
| Weight | < 29.0g (< 1.0oz) |
| Interface | All FAST™ Red Dot and Magnified Optic Mounts (Excl. FTC Mounts) |
| Required | FAST™ Optic Adapter Plate |
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