No drilling, tapping or major alteration. Guaranteed to hold zero. Can be removed and reinstalled easily. Windage adjustable. Made in the USA of top grade military allan aircraft aluminum.

Installation instructions for the MAS 49/56

Hold the side plate with the (3) screw holes to the top and the pointed part facing away from you. Install the top rail with the screw holes to the left and the top rail hanging over the front of the side plate. Slide the assembled mount onto the dovetail on the left side of the receiver. Install the (2) set screws and tighten.