M1 Garand peep sights ?

[mac1911]

by design: Are they designed for one eye or two eyes open ?

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[jmoore]

I guess it depends on your vision. I've always run irons and scopes both w/ both eyes open. Both open supposedly increases detail, but it also increases situational awareness.

(It's one issue I've always had w/ the majority of 1st person video games like Call of Duty et. al.)

[Learmorer]

Whether you shoot with one eye, or with both eyes open is going to depend on whether or not you are shooting with your master eye. If you are right handed and have a right master eye, it is best to learn to shoot with both eyes open. If you have a cross dominance, such as right handed with a left master eye, you must adjust by either learning to shoot left handed (so the master eye sees the sights) or shoot right handed and close the left eye (so the master eye does not see the sights and confuse the sight picture).

[Bob Seijas]

Not exactly to the point of your question, but John Garand called it a "head positioner." You can't focus on three things at once, so the rear sight was intended just to make you put your head in the right place to focus correctly on the front sight and the target. Pretty cool. FWIW, almost no GIs I ever saw shot with both eyes open except for snap shots at close range. In qualification with the M1 I got one close silhouette from the hip a split second before it went down

[mac1911]

Im LH and L eye dom...shoot LH. except for when my dad is around "your on the wrong side of the gun" he would always say. Im pretty ambidex. For the brief 10 shots or so that I seemed to see fine I liked the clearity of 2 eyes open. Soon though I lost it and could not really pick up the sights with out blurring ?

[browningautorifle]

In the military we teach close the eye not in use. It's done for a reason. This will sort out how to shoot. If you survive long enough, you will figure the rest out for yourself.