Trigger reset
Trigger reset is shorter than full travel on most/all semi automatics, so this is normal. I've never measured how far it is, but since I am building a match trigger for the 556, I'll measure it once I get my first prototypes done and start evaluation.
As to red dot, I think you are stuck with it. The radius of the red dot sight is greater than the height of the rear aperture, so for the sight line to remain parallel to the iron sights, the red dot will necessarily be slightly higher than the front sight post. Options are to remove the front post, or figure out how to raise the post, so it coincides with the dot, though this would forever render the iron sights way out of line ... or simply get used to it. I don't think any other red dot would improve your concern.
Art
Trigger reset is shorter than full travel on most/all semi automatics, so this is normal. I've never measured how far it is, but since I am building a match trigger for the 556, I'll measure it once I get my first prototypes done and start evaluation.
As to red dot, I think you are stuck with it. The radius of the red dot sight is greater than the height of the rear aperture, so for the sight line to remain parallel to the iron sights, the red dot will necessarily be slightly higher than the front sight post. Options are to remove the front post, or figure out how to raise the post, so it coincides with the dot, though this would forever render the iron sights way out of line ... or simply get used to it. I don't think any other red dot would improve your concern.
Art