Oh, Okay. Now I know which one you bought. You have what is called an "as issued". V groove in top strap, not the model with the adjustable rear sight. I have three as issued, and they each have different front sights.
Ok guy, now we're getting somewhere! First off, that model, the as issued, is a toughie because of the small area that you have for sighting, in the rear portion. And sometimes the front sight is too wide, and makes it difficult to find when looking through the rear sight.
The first question is what type of front sight do you have? Basicly, there are four kinds; truncated cone (screws in straight down from the top like a screw). Straight pin, that screws straight down from the top. Dove tailed straight in from the muzzle. Or dove tailed which move side ways from left to right or vice versa. Also whether the front sight has a half moon shape at the top. Lets determine that first and we'll go from there.