The Patent Pending Arisaka Inline Scout Pro Mount is designed specifically for the Surefire Scout Light Pro swivel bodies. This mount is a drop-in replacement for the OEM M-Lok mount, and allows for optimal positioning with lasers, plus can be used in a cantilever fashion off the end of the handguard for less barrel or suppressor shadow. The Patent Pending design features a triangular shape that resists twisting or bending. Compatible with the following Surefire Scout Light Pro models: M140A, M340C, M340V, M640DF, M640U, and M640V. Length: 3.0" Weight: 0.8 oz The mount is CNC machined from 6061-T651 aluminum and MIL-A-8625 Type III hard coat anodized. Recomme Mfg: Arisaka Defense