Decent BUIS for less money?

[SPQR 70AD]

You are looking at the field of view of a photograph. The photograph represents only a fraction of what you would see if aiming a firearm with a red dot at a target. The human eye sees up and down left and right limited by the brow, the lower cheek and the shape of the eyeball for left and right. Like this;
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If you are nervous then you go into what's called ocular occlusion where you only process, or perceive the reflected light that falls on the fovea in the middle. It's popularly called 'tunnel vision'. The threat is identified and the body 'attends' (moves so the senses are in the best position to process the threat). In a shooting scenario we turn to face the threat so we look directly at it. If we are of the mind to ignore everything else it is called, 'target fixation'. Humans are predators so the ability to judge distance to target is important and this happens using stereoscopic vision. Unlike typical prey animals who have evolved to have eyes on the sides of their heads to detect threats almost 360 degrees we have evolved to have less field of view but with 114degrees of stereoscopic overlap to the front. That 114degrees is then narrowed even further by the brain as it processes the immediate threat only. This is why combatants are taught the dogma of looking left and right after discharging their firearm so as to force them to take in their surroundings, this given we are tempted to target fixate when stressed. If a person is battle-experienced and sharp this tunnel vision will not be as severe as ultra-nervous types.

My point is, forget the photo as it's not what your eyes see. And what your eyes see in a gunfight depends on how acculturated to stress and violence you are, and how you react when stressed. Regardless, if there was a man standing either side of that Aimpoint you would see them. If they were standing further apart, say 90 degrees left and right it would depend on a few things, including how close they were to you, what they were wearing, whether they were moving and how comfortable you are in chaos.

I have shot hundreds of round with different holo sites and many types of red dots so I am not going by the pics I just used them to make a point. other guys can do as they please but for me with a ghost ring I can see everything and on a man size torso up to maybe 40 yds when I shoulder the rifle I do not need to line up 3 things. I just put the front site on the torso while rifle is in my shoulder