Also, correct me if im wrong, but when a No.4 rifle went through FTR, along with the improved trigger, a strengthened pattern of bolt,{using a higher grade of steel}, elimination of the hole in the bolthandle, and a new type of spring and 3/32-in. diameter steel ball to repace the spring and plunger for the rear sight.
All the above info, is of course, courtesy of "Ian Skennerton",and his book "The British
Service Lee".
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