So we can add them to the list of places I've talked to that said they would do prefits, or ARC said they would do prefits, or ARC said they are trying to get to do prefitsX-caliber barrels will cut a conical breech for an added fee. (According to the email I got only about $25 extra)
x-caliber
PVA
Preferred barrels
LRI
Straight Jacket
Proof
Hoping other guys like carbon six, mcgowen, IBI do prefits too. I am not sure if NSS will do the conical breech. I can email james and ask.