Kent, I have Mepro's on my G21 too. They are the first night sights I have ever had and I absolutely think they are better than pockets on shirts and sliced bread, they're GREAT. However, It sounds like to me that you may need your eyes looked at or perhaps you are trying to focus on he rear sight, the front sight and the target at the same time. Concentrate your focus on the front sight and let the rear and the target go shightly out of focus. Start out by looking at the target raise the gun to find the front sight in the rear notch and then transfer the focus to the front sight. If when you raise the gun to find the sights lined up; if the sights do not line up you have a grip problem. The gun must naturaly point, for me, some do, some don't and if they don't I can't hit the broad side of a barn at two steps. If it takes more than a second or two for me to get the first shot off there is something wrong. The gun is not a seperate entity but an extension of my hand and arm, it's like pointing your finger thereby making sighting an almost unrequired or natural act. If you are coming down on the target you can not see the target because the gun is in the line of sight. Practice this: place two doits on a piece of paper five or six inches apart, place the pencil on the first dot then look at the second dot and without moving your eyes draw the line. I almost garentee you that the line will be so straight that you can lay a ruler down and it will line right up but if you look back at the first dot or let your vision wonder the line will be wavy. For me shooting a gun is the same way. I hope this helps and is not a smart ass answer. I have taught a number of people this line of reasoning and they are amazed at the change. It ranks right up there with trigger and breath control. When you get it all together you can't help but see the difference. Speed quickly follows. Regards P.T.