For ideal execution, you should just set the sight at the forward segment of the firearm because putting it excessively near you will bring about an absence of familiarity with the environmental factors, and it limits your peripheral vision when searching for an objective or prey.
You’ll appreciate a decent view on this position in light of the straightforwardness which you’ll make the sight while you remain mindful of the environment. A typical mistake made among particular shooters is that they mount their sight nearly at the backside of the rifle, which is simply excessively close