I know remington will but svage,well,it depends on who you talk to.I didnt know they offered a 5r barrel on anything.Maybe someone will chime in with the best contact person to talk to and get it strightened out.It sounds like they should replace the reciever if it is stripped out being new and all.I personally drill and tap them out to 8-40 tpi and get a good rail with that screw arrangement. If the barrel shoots lousy then by all means insist they change it out.