The GBRS Group 2.91 FTC magnifier mount is a flip-to-center optic riser built around the proven Flip-to-Center technology from UNITY Tactical. It's designed to bring a wide range of 3x and magnified optics up to the 2.91-inch optical centerline—the height of GBRS's Hydra mounting systems—so your magnifier sits perfectly in line with your primary red dot or holographic sight. If you're running a dual-optic setup on a modern rifle platform and want the magnifier to stow cleanly without blocking your unmagnified view, this mount does exactly that.

The key advantage here is placement. Unlike flip-to-side magnifier mounts that swing the optic out of the way, the 2.91 FTC employs a simple force-to-overcome mechanism that flips the magnifier down and stows it completely below the optical sight plane and within your rifle's receiver footprint. When you need magnification, it flips up to co-witness with your primary optic. When you don't, it stays stowed with zero occlusion of your zero-magnification sight picture. It's mounted via QD lever to your rail, so detaching it is straightforward if you need to run a single optic setup.

Built from 7075-T6 aluminum with Type III hardcoat anodize, it's ruggedized for hard use. The mount is compact—2.25 inches long, 2.72 inches wide—and weighs just 5.2 ounces, so it won't add significant bulk or weight to your upper. Compatibility spans the major optic brands: EOTech's G-series magnifiers, Holosun 3x magnifiers, Sig Sauer's JULIET series, Trijicon MAG-C, and Vortex's VMX and Micro magnifier line.

Key Features

• Flip-to-Center mechanism stows magnifier below sight plane with zero blockage of primary optic
• Raises magnifier to 2.91" optical centerline for co-witnessing with GBRS Hydra systems
• Mounts via QD lever for quick detach from Picatinny rail
• 7075-T6 aluminum construction with Type III hardcoat anodize finish
• Compact and lightweight at 5.2 oz
• Compatible with EOTech, Holosun, Sig Sauer JULIET, Trijicon MAG-C, and Vortex magnifiers

Specifications

Height to Optic Centerline	2.91"
Length	2.25"
Width	2.72"
Height (Stowed)	2.78"
Height (Raised)	4.00"
Weight	5.2 oz
Material	7075-T6 Aluminum
Coating	Type III Hardcoat Anodized
Mechanism	Force-to-Overcome
Rail Mount	QD Lever

Frequently Asked Questions

What magnifiers work with the GBRS 2.91 FTC mount?

The mount is compatible with EOTech G23, G30, G33, G43, and G45 magnifiers; Holosun HM3X and HM3XT; Sig Sauer JULIET3 3X, JULIET3-MICRO 3X, JULIET4 4X, and JULIET5-MICRO 5X; Trijicon 3X MAG-C; and Vortex VMX-3T, Micro3X, and Micro6X models (as of June 2024).

What's the difference between flip-to-center and flip-to-side magnifier mounts?

Flip-to-center mounts stow the magnifier straight down below the sight plane and within your receiver's footprint, keeping your primary optic unobstructed. Flip-to-side designs swing the magnifier out to the side, which can still block part of your sight picture depending on your setup.

How does the mount attach to my rifle?

The 2.91 FTC mounts via QD (quick-detach) lever directly to your Picatinny rail, allowing fast attachment and removal without tools.

Will this mount work with my GBRS Hydra system?

Yes. The 2.91 FTC is specifically designed to bring magnifiers up to the 2.91-inch optical centerline to pair with GBRS Group Hydra mounting systems for proper co-witnessing.