I know it's not the answer you requested but it's actually pretty easy to do on your own with a simple chamfering tool you can order from a distributor like Brownells or the like. I did a few of my revos.
Cool guns. [thumbsup]
Like the op says. Open to all. Really hoping to see someone's ancient Chinese hand cannon center piece under glass [laugh] but I'm not going to flame anyone for posting something modern.
Oh crap. Could of sworn it was bumped recently. [laugh]
Couldn't hurt to make a call. I'll look again.
Edit: it was this one.
$5000. [rofl] I mean drool but.... I'd...