Just installed a set of Magpul sights on my AR. I mounted the rear as far back as I could without it interfering with the charging handle when folded. When I look through the rear aperature, (nose to the charging handle) it is so blurry I dont have a hint of edge with which to guage center alignment of my front post. The smaller peep is no better. My question is , should I move it forward until it gets somewhat better? I know its not supposed to be perfectly clear, but I dont see how I can make a proper alignment if its all just fuzz. Anybody else have this problem? Is it even a problem at all??????