Keyed Guide Rod, 6 mm Diameter, 4-40 Thd, 4 in. Length, A-LINE

The LH-GR-4 Guide Rod is 6 mm diameter and 4 in. long with 4-40 thread. It allows any of the A-Line optic holders to mount with the same orientation along the rod. Two flat and parallel surfaces, machined along the length of the rod, key the A-Line mounts to the same rotational orientation.