Great alternative to milling - Strike Industries G.U.M. Glock Version 2 Universal RMR Cut Optics Mount Adapter Plate

Was planning to mill my Glock 21 slide to mount an optic and saw this product. It is an amazing design how it can mount so many optic footprints. It is a strong heat treated steel that makes me confident the threads will not strip. Had to file the bottom of the dove tail surface a little to lessen the insertion force. Got it to push in about half way and used a small plastic mallet to drive it to center. It is the exact same width as my slide which made it easy to center by eye. Comes with every screw and locator pin size you would ever need. Highly recommend.