It's just the feed rails.... no detonation risk..... I mean look at them. If - big if- that bevel on them really needs to continue (be widened) then it's a bit more complicated. I'd likely modify one of my countersinks and do it on the mill. But I suspect there's plenty of bevel there, and it can just be plain ol' widened up. But I'm still researching this.
On my other action I'd be opening the bolt face as well. That looks like a bit of a pain (eccentric undercut for the clip extractor) unless I mill the bolt for an M16 extractor.
The other cool thing about a truly bare action from Bud's is that I don't end up with yet more barrels, cheap stocks, and other "stuff" piling up everywhere messing with my "no hoarding!" personal mantra.
Manual machinist here BTW.... I did just see a drawing over in PM showing CNC toolpaths for opening a boltface....
