The reason the barrel maker requests a bolt is to headspace your barrel combnation. The process starts by profiling the barrel in a lathe then the threads are cut into the barrel. Next the barrel extension is test fitted and material is removed from the back of the barrel until the spacing is correct. The next step chambering is done , then the barrel extension is installed and placed in a upper receiver and headspace is checked. If it is not within limits barrel comes out of upper barrel extension comes off and material is removed from the back of the barrel to bring it into specs ,then reassembled and headspace again. This time its in specs and done unless you want a threaded barrel which is the next step followed by working on the crown and timing a muzzel device.
Sagamahari City just west of Toyko ,20 year old was slicing up handicapped people in a building. Helpless victims !!!! He was captured and is in police custody.
So you got sick drinkin' "Blow Jobs " Ha Hà ! (Barcardi rum,Malibu rum & Bailee Cream).
Ski trip during school ... Case of MD 20/20 great stories ! House party with Cisco ,funny poop ! Boones Farm on a river rafting trip ,not a good idea ! Lol !