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hammerhead_77
02-07-2012, 11:14 AM
Please pardon me if this should be in the gunsmithing forum...

When measuring for a 16 inch (or 16.25 for safety) barrel on a rifle, where does one measure from? The point where the barrel seats against the receiver? The end of the rifling lands? Is this a known definition or one of those points of discussion with LE/DA's/DOJ?

Thanks, CalGunners...

Markinsac
02-07-2012, 11:39 AM
The measurement is from the bolt face of a closed action to the end of the barrel, including any permanently affixed devices at the end of the barrel.

Decoligny
02-07-2012, 11:46 AM
Don't know if it applies to every firearm, but IIRC shotgun barrels are measured by taking a dowel and inserting it into the unloaded shotgun, action closed. When the dowel seats, it is marked at the end of the barrel. It is then removed and measured from the end of the dowel to the mark.

If I am wrong with my description, I am prepared to be immediatly thrashed with a dead fish.

hammerhead_77
02-07-2012, 11:55 AM
Thanks, guys... would you have any reference for that or is it more a "tribal knowledge"?

Munk
02-07-2012, 12:46 PM
ATF publication on NFA status and on shotgun and rifle barrel length determination. (http://www.atf.gov/publications/download/p/atf-p-5320-8/atf-p-5320-8-chapter-2.pdf)

motorhead
02-08-2012, 9:59 AM
one of the easiest ways is to mark a cleaning rod.

motorhead
02-08-2012, 10:00 AM
one of the easiest ways is to mark a cleaning rod.

hammerhead_77
02-08-2012, 10:07 AM
Thanks much for the reference, Munk. As a last question, do we have any reason to think that our own DOJ would choose to do things differently than ATF? I'd think it to be a rather defensible position, but I'd rather avoid any SBR / SBS drama.

Quiet
02-08-2012, 9:51 PM
As a last question, do we have any reason to think that our own DOJ would choose to do things differently than ATF?
CA DOJ measures barrel length the same way the BATFE does.

hammerhead_77
02-09-2012, 9:00 AM
Thanks for all the feedback! I'm actually quite pleased...meeting the 30" OAL PRK requirement will actually give me plenty of extra barrel to avoid any SBR issues measured this way.

Mods can delete as needed.

Munk
02-09-2012, 12:15 PM
Mods can delete as needed.

I'm curious why people have this impulse to delete their threads once they're answered?

Perhaps other people have similar questions and the answer would also be appropriate to them.