GBRS LERNA MOUNT AMPNT DUTY RDS BLK

Description

The GBRS Group Lerna Mount is built for shooters who run their rifles under real equipment loads — helmets, communication headsets, gas masks, or night vision systems — and need their optic positioned to work with that gear rather than against it. The specific-fit version configured for the Aimpoint Duty RDS brings that same elevated-optic philosophy to the Duty RDS footprint, so the mount interfaces directly with the optic’s base geometry rather than relying on an adapter.

The 2.91-inch optic centerline is the core design decision here. That height pulls the sight line up enough that a shooter can maintain a more upright, neutral head position rather than having to drop their chin to meet a conventionally low-mounted optic. When wearing a plate carrier and presenting armor to a threat, this posture difference is meaningful: it lets the spine stay more vertical, which supports faster transitions and reduces fatigue during extended use. The trade-off inherent to any elevated mount — a taller sight-over-bore offset — is a known constant that experienced shooters account for in their holds at close distance.

The mount carries a black anodized finish and is covered by GBRS Group’s Limited Lifetime Warranty. For anyone already running the Aimpoint Duty RDS and looking to build an ergonomically honest mounting solution around how they actually work, the Lerna is a purpose-built answer rather than a general-purpose compromise.