I'm looking at getting a rear iron sight for my flat top AR15 that has a standard milspec A2 front sight. I've been looking at the ARMS 40L and the 40L-SP. Also the LaRue LT103. I'm having trouble understanding the "same plane" feature on some of the sight apertures. Sorry if this is a stupid question but I'm lost. Can someone fill me in. Thanks
Need help understanding rear sight
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I prefer the Larue over the DD and do own both. No need to spend the extra $25 for the Larue QD lever. Just buy the one that bolts on. You won't need to take it off quick for anything. And buy the same plane.
The standard A2 sight has two apertures but they are NOT the same elevation. Not because one is bigger but because one is offset for more elevation for a battlesight zero and they smaller one is set up for more precise zero. The same plane sights have two different apertures but they are exactly the same elevation and hence your zero does not change regardless of which size aperture you use and it will with the different apertures on the A2 sight.
The standard A2 sight has two apertures but they are NOT the same elevation. Not because one is bigger but because one is offset for more elevation for a battlesight zero and they smaller one is set up for more precise zero. The same plane sights have two different apertures but they are exactly the same elevation and hence your zero does not change regardless of which size aperture you use and it will with the different apertures on the A2 sight.
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