Just received my Ultradot 4. I ordered it along with a cantilver mount from www.larrysguns.com Order was placed Monday and received Saturday. I wanted the cantivler mount because I wanted the red dot mounted further back than allowed by the stock 3/8 rail. The mount from Larry's Guns seems rock solid and well buildt. The ultradot was easy to mount. We'll see how the combination shoots tommorrow.