I use to collect data on the square and round bolt recess cut on receivers. I found that the highest SA serial number for a square cut was s/n 54279 but also found that the round bolt recess cut first appeared on s/n 49928. Springfield was producing both types of receiver bolt recess cuts for a short period. All receivers were revision 2.
Anyone have anything to add to my data would be appreciated
Anyone have anything to add to my data would be appreciated
Comment