Originally Posted by splattttttt
Very nice work on the bolt. But why didn't you just machine the stock bolt to fit flat rings on it?
Wanted to increase the diameter slightly so I could then undercut the diameter between the ring grooves for less drag. Notice that there is a bearing surface next to the flat rings and then a smaller diameter that is NOT in contact with bolts bore.
Also having the diameter slightly larger between the flat rings at the gas delivery hole portion further reduces gas loss's.
And ... because I can