I use a Red Dot sight. It always is on top of my A5. I've got it sighted in for about 35 feet. I feel the reason many people have problems with the sight is getting it sighted in. With a red dot sight, you can sight it in without a mask on. When your mask is on, all you need to see is that dot, as long as you can see that dot and put it on target, it will go where the dot is. My sight is used mainly for my first shot engagements, for finding that small opening in that bunker, or where the noob is repeatdley poking his head out from. At this point, i fire a three to burst to be sure i'll get a break. during a sustained firefight, I try to drop back or get cover fire so i can change my position and get the time i need to make the sight work for me.