GBRS Group Lerna Mount Kit, Fits Aimpoint ACRO, Anodized Finish, Flat Dark Earth GEAR-LERN-ACRO-FDE Lerna is the first optic mount designed for end-users that offers a 2.91" Optic Centerline for faster target ID, regardless of gear/ equipment obstructions, i.e.. EarPro/Comms headsets, Gas masks/ CBRN, and Night vision use. A higher Optic allows for a more athletic posture and Heads up attitude that enables the end-users to maintain a vertical spine which translates to body armor or presenting plates to the threat. This Heads up style allows for faster processing speed and increased situational awareness.