I got a Primary Arms Blem Prism sight a while ago that I finally mounted. It's a 3x model. I'm not sure if it's me, or the scope, but I have to get my eye really close to the scope to see start get through it. Not scope eye close, but the eye relief can't be more than 3 inches. Prior to getting close, I can see the reticle, but the field of view seems blocked and I can only see through about half the sight. Once I get closer, the sight picture is fine. Any answers on this one for me?
That is the nature of prism scopes. You trade eye relief for field of view. Eye relief for the Primary Arms scopes is slightly different for every shooter but are between 2.5 and 3.0 inches.
An ACOG has around 1.5 inch eye relief for comparison.
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