Monstrum Grimlock Universal Red Dot Mount w/ Complete Screw Set Compatible with Drilled and Tapped Shotgun Models RMSc Footprint Black. Available in RMR or RMSc footprint standards. Not compatible with other red dot models. Please view compatibility chart to verify the compatibility of your red dot before purchasing. With slots that accommodate multiple drill hole patterns plus a complete set of commonly used drill hole screws. Specifications for Monstrum Grimlock Universal Red Dot Mount w/ Complete Screw Set: Manufacturer: Monstrum Color: Black Features of Monstrum Grimlock Universal Red Dot Mount w/ Complete Screw Set Installs directly into the factory mounting holes on the receiver using the included set screws. Recommended torque specs: 15 in/lbs. Includes both #8-40 and #6-48 screw sets in multiple lengths for compatibility across different makes and models. Package Contents: Monstrum Grimlock Universal Red Dot Mount w/ Complete Screw Set Monstrum ZD772C: Grimlock Universal Red Dot Mount w/ Complete Screw Set Compatible with Drilled and Tapped Shotgun Models RMSc Footprint Black