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Sold out !!!
In case you were unaware, John Browning thought that the bottom plate of the 1917 needed no rivets at all. Until bottom plates and side plates were cracking on significant numbers of guns during the War and the Ordnance Dept had to develop a fix. It was at the Ordnance Dept, years later, that the stirrup bottom plate was developed. Colt, meanwhile, had already redesigned the bottom of the receiver to include small rivets, though not 60 degree. See the 1928 water cooled, for example.shootnstar said:...how about we talk about why Browning used 60 degree rivets in his designs instead of 90 degree.......