American Defense RMSc Lower 1/3 Lightweight QD Mount

The American Defense Lightweight TR lower-one-third mount uses the RMSc footprint on a quick-detach base. It places the optic higher than the co-witness TR version while keeping the same compact mounting family. The black anodized finish gives the mount a uniform appearance with most black rail-mounted sights.

Lower-one-third height is the main reason to select this model over the co-witness Lightweight TR. The optic remains attached to the base when the QD mount is removed, which keeps the sight and dedicated footprint together as a unit. Unlike the 45-degree offset model, this version keeps the optic in the normal upright position.

This mount is aimed at RMSc-pattern sights that need a taller lower-one-third position on a lightweight detachable base. It provides a direct height alternative without changing to another footprint or mount style. Compare more compact sight mounts in optics and rangefinders.

• RMSc mounting footprint
• Lower 1/3 optic height
• Lightweight QD base
• Black anodized exterior