Amazing ambi-catch - SIG SAUER Ambi Mag Catch Assy, M400, 516

This mag catch, wether actually made by SIG or not is the same type used by SIG for their rifles, it's completely useable on any standard lower (some billets may not work). I have this on several lowers including FMK poly, Anderson, Aero, and Ruger. It's must better than the hinged style that can cause weak lock up on the mags and require harder seating. Over all this works exactly like milspec catch with a cam lever that sits right below the BHO lock. It clears my SI extended bolt catch with no clearance issues either.