Originally Posted by
DeltaSierra
I am trying to find what the spec is for the measurement between the front and rear takedown pins on an AR lower is.
Also, I am trying to find what is considered to be "within spec" for the width of the ears on the upper receiver that mate with the pins in the lower receiver....
(No, I haven't been drinking, I just don't know what the technical term is for the parts in question....)
I did a search for this information, but I couldn't find anything in the way of exact dimensions.
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