This past winter, I bought an M&P15-22. I had shot it one time at an indoor range for function, not really paying attention to where it was hitting. Just basically banging them through at short distance. The second time I shot it, I had installed a Primary Arms red dot and some MBUS. I thought it was odd that it took about 24 cranks on the PA to bring the rounds up to POA. It still didn't dawn on me that the rifle might be off. Then I started zeroing the MBUS and noticed I had to crank the front sight almost all the way down to bring point of aim up to where it should be. I left the range a bit miffed, and thought that maybe the PA sight had a weird bow in the lens or something, at it was making the front sight appear where it really wasn't. So this third time, I took the aftermarket stuff off the rifle and put the stock sights back on and went shooting again. At 15 yards, this is what I got. The first group on the bottom right is with the rear sight centered for windage and set at 6/3, and with the front sight flush. It took eight clicks down on the front sight tip and three clicks of windage to get on the black. But as you can see, I still need a bit more. Probably two more clicks of windage and one or two more clicks of the front sight tip. To me, the front sight is requiring way too many clicks and it doesn't have any more clicks. I am wondering if I simply need to try zeroing at a different distance, or if you guys think there is something wrong with that rifle. I am not that familiar with 22LR in a rifle, but I still think it odd because I took that same Primary Arms optic and mounted it on my SIG 522, and I had to take 16 clicks out of it, in order to bring my rounds to point of aim. So where are you guys zeroing your 15-22s, and has anyone else experienced this?