Running a primary optic on a high-clearance mount often creates a need for an immediate close-quarters backup optic. Traditional handguard-mounted 45-degree offset mounts push secondary micro red dots far outward, creating severe snag hazards on gear, unbalancing the rifle, and consuming valuable rail space.

The Unity Tactical FAST™ Offset Optic Base offers a streamlined, highly integrated offset geometry. As part of the FAST™ Modular Accessory suite, this base bolts directly to compatible FAST™ primary optic mounts (designed for red dots and magnified optics), bypassing the rail completely. It places secondary micro red dot sights at a refined 36-degree offset from the primary optical centerline. When paired with a required FAST™ Optic Adapter Plate, the offset red dot sits at a 2.05″ mechanical centerline above the rail. The 36-degree angle keeps the secondary optic tucked tight against the weapon receiver for rapid visual acquisition upon slight rifle canting. Precision CNC-machined from 7075-T6 aluminum, it weighs less than 1.0 oz, making it the ultimate lightweight backup sight base for duty or sport.

Key Features

• 36-Degree Refined Offset Angle: Tucks the secondary optic closer to the weapon body than standard 45-degree mounts, lowering snag profile and accelerating sight alignment upon rifle cant.
• 2.05″ Mechanical Centerline Height: Delivers a 2.05″ optic centerline above the rail when used with a FAST™ Optic Adapter Plate, preserving ergonomic heads-up orientation.
• Direct Mount Integration: Fastens directly to compatible FAST™ primary optic mounts, saving handguard rail real estate for lights and lasers.
• Modular Adapter System: Accepts all FAST™ Optic Adapter Plates to support a broad array of micro red dot footprints (e.g., RMR, Acro, Micro).
• 7075-T6 Aluminum Build: Constructed from high-strength 7075-T6 aluminum finished in Type III hardcoat anodizing for rugged durability at under 29 grams.

Technical Highlights

• Brand: Unity Tactical
• Product: FAST™ Offset Optic Base
• Available Colors: Black, FDE
• Offset Angle: 36 Degrees from Centerline
• Mechanical Centerline Height: 2.05" Above Rail (when paired with Optic Adapter Plate)
• Material: 7075-T6 Aluminum
• Coating: Type III Hardcoat Anodized
• Weight: <1.0 oz / <29.0 g
• Interface: Bolts directly to compatible FAST™ mounts
• Mount Compatibility: Compatible with all FAST™ mounts for red dots and magnified optics. NOT compatible with FAST™ FTC magnifier mounts.
• Orientation: Sits on the right side of the FAST™ mount when mounted forward on an M1913 rail.

Applications

Designed for shooters utilizing FAST™ primary optic mounts who require a secondary micro red dot sight set at 36 degrees for immediate transition between primary optics and backup close-quarters aiming.

FAQ

• Q: Can I mount a red dot directly onto the FAST Offset Optic Base?
  • A: No. The Offset Optic Base requires a footprint-specific FAST™ Optic Adapter Plate (sold separately) to attach micro red dot optics.
• Q: Is the FAST Offset Optic Base compatible with FAST FTC magnifier mounts?
  • A: No. It is not compatible with FAST™ FTC magnifier mounts. It only attaches to FAST™ mounts designed for primary red dots or magnified optics.
• Q: Which side of the weapon does the FAST Offset Optic Base sit on?
  • A: When the host FAST™ mount is installed facing forward on the M1913 rail, the Offset Optic Base sits on the right side.