I spoke to DD tech support today. We had the DD website pic of bolt asembly ( http://www.danieldefense.com/?page=s...product_id=153 )in front of us and he had their DD bolt assembly in hand.
He told me that the right and left rear corners of the lugs were the same, square, one was the mirror image of the other. From this I gather that the one in his hand had no lead-in cuts.
I also asked specifically about the shelf immediately behind the lug, parrallel to lug. (Recall, immediately behind each lug is a little shelf parrallel to the lugs. There are also parrallel troughs between each lug. These troughs run the length of the lug and the little shelf immediately behind each lug (extractor aside).) He told me that the shelf immediately behind the lug had no slash marks, no semi-elliptical or half-moon cuts.
From this conversation with DD I deduce that not all DD bolts have the lug area characteristics of an FN bolt. I presume and believe that DD sells a mighty fine bolt because they are generally known to make and to sell good stuff.
I did not ask about the details of their procurement and manufacuring processes.



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