Apparently this is not all that uncommon but I would like some experienced machiners to explain how to approach the proper sizing of the lug pocket in a 80% lower. From what I can tell the dimensions for the pocket match the Cad drawings but the forward pivot post does not fit into the pocket. I believe the corner of the post needs a more square pocket with a sharper corner while the pocket has a radius and there in is the problem. Should I use smaller diameter end mils or longer front to back pocket dimensions?


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