Irony of ironies, I flipped on my EOtech 512 when my flip-up back-up iron sight lost a spring and got all wonky. After I took the next AQT to sight the EOTech in, I shot a 217 with it, so yes, it can be done. This was at Simsbury, CT last summer when crak pulled me from the center of the line and put me all the way to the left 'cuz my muzzle brake was kicking up dust across the face of 4-5 shooters on both sides of me! Good times...