I am looking at making a trade for an early IBM that possibly hasn't been rebuilt. it has a flat bolt, early push button safety, flip sight, and early type 1 barrel band. it also has an IBM receiver that is also marked with an AO under the serial number. can anyone put a dollar value on this, or do you need more info?
AO made a lot of different parts and many were for IBM. In fact IBM was making the type 3 bolt before the other makers using AO to make them. That is one of the reasons for the X marked IBM type 3 bolts as not having all of the latest updates. But AO was making receivers for IBM and supplied at least 50,000 of them. Not all are marked with AO on the bevel.