I have an extra lightly used Insight RMT-400-A8 dual pressure switch available in flat dark earth coloring. This works with the Insight M3, M3X LED, WMX 200, etc...and also plugs into a PEQ laser device. Attaches directly to the M1913 rail via an integrated clamp. Perfect for an M4 SOPMOD Block II project. Yours for only $35.00 shipped.