Doesn't get better than this - Troy Tritium Folding Front Sight - M4

This sight is awesome and was dead on from the box after tightening down using Fed. M855 62 grain ammo. Just needed to move my rear sight 5 clicks to the right to put POI in bulls eye at 50 yards on my BCM 16" middy. I suggest using blue lock tight on screws after you decide if you want sight at the very end of rail or a couple notches back. I like it at the end for longer sight radius but depends on where you might be placing your weapon light and if you use an offset mount like a Thorntail. That is important as to the accessibility to pushing release pin to fold down sight. I had just enough space to get my finger to push pin in at the end putting my light as far forward as possible using this mount on my Inforce WML light as I don't want any shadowing when using light. Good shooting.