dbarn, Thank you so much for the pictures of your carbine and the bolt. If a bolt did truly come parkerized it is your bolt on that gun! Very convincing. But my bolt has parkerizing in the punch mark that makes me doubt mine is original. Still, what rule or military order said that all bolts must be blue from the OEM carbine supplier? But wait! .... if you rework a carbine then the bolt can be parkerized. What the hey?!!!