Here's Sumtoy's prototype for red dot sights on my MP-18 Baikal .410. I will mount a Docter on it. Note that it is curved to fit the barrel making it more secure than the flat based 336 mount. With this, no flat spot needs to be milled on the barrel. He will have future mounts anodized. This one isn't. After I zero the gun and Duracoat the metal, I'll give a report.