GBRS Group Lerna Trijicon MRO Black Optic Mount

The GBRS Group Lerna mount gives a Trijicon MRO optic the GBRS 2.91 in centerline in a dedicated optic-only configuration. GBRS describes Lerna as using the same elevated mounting concept as Hydra without the separate accessory mount, which keeps the system focused on the sight itself. This Black variant uses cerakote finishing over an aluminum mounting body.

The GBRS Group Lerna Trijicon MRO Black Optic Mount should be matched to the exact Trijicon MRO footprint before installation rather than treated as a universal riser. At 2.91 in, the optic sits substantially higher than traditional co-witness heights, so cheek position, magnifier alignment, and backup-sight use should be planned around that centerline. Secure the base to the host rail and install the optic using the hardware and torque guidance supplied for the mount and sight.

This Black Lerna version is a logical choice for users who want GBRS's elevated optic geometry without Hydra's additional accessory-mounting section. The main comparison points are optic footprint, finish, and the 2.91 in sight height rather than cosmetic differences alone. See more red dot mounts for other red-dot footprints, risers, and mounting configurations.

• Dedicated Trijicon MRO mounting configuration
• 2.91 in GBRS optic centerline
• Black cerakote finish
• Aluminum construction