Measuring barrel length

[351322]

When a barrel manufacturer/dealer states that a barrel is X inches in length, is that measurement from the bolt face to the muzzle or something else?

[Judicator]

Pretty sure. If not they measures barrel extension to top then every "16"" barrel would be breaking NFA till a muzzle device was installed. Honestly I never measured tho.


Sent from my IPhone, please ignore spelling mistakes. Siri is dumb.

[Iraqgunz]

.005 second Google search.

The ATF procedure for measuring barrel length is to measure from the closed bolt (or breech-face) to
the furthermost end of the barrel or permanently attached muzzle device. Permanent methods of
attachment include full-fusion gas or electric steel-seam welding, high-temperature (1100°F) silver
soldering, or blind pinning with the pin head welded over. Barrels are measured by inserting a dowel rod
into the barrel until the rod stops against the bolt or breech-face. The rod is then marked at the
furthermost end of the barrel or permanently attached muzzle device, withdrawn from the barrel, and
measured.