Just put it on my AR10 and took my calipers to it. From the top of the lugs on the rail to the Center of the scope mount rings was 30mm. I can't say it will fit as I don't know and don't have a scope with a 50mm objective to check it with. It would be my guess that if you measure the outside of your scope objective and divide by two. If it is less than 30 mm it should fit.