Thanks Mad Dog. I took another look at the marking and you are correct, it is an E and as you suggested there is no checkering. Thanks to my great camera on my phone I was able to zoom in and you can faintly see the lower limb of the E. Any recommendations as to how I handle the blind mag since on the original stock the mag opening is cut through? Do you think a hinged floor plate would fit or would I wind up with feed problem? Regards, FreddieB