How does the ATF measure shotgun barrels?

[fallingrock]

I would like to cut down an old break barrel single shot 12 gauge. I just want a compact utility shotgun but certainly don't want to get on the bad side of the law. Would I be legal and have some room to spare if I left the overall lenght of the barrel at 19 inches? Just wondering if they measure from the end of the chamber or something. Thanks

 

[Hump66]

I believe they measure from a closed chamber with a dowel.

 

[PUMPKIN]

dont they stick a rod down the barrel against the bolt with the bolt closed?? and then measure that?

 

[ahamay6]

^^^^^^that is correct

 

[superdave65]

dont they stick a rod down the barrel against the bolt with the bolt closed?? and then measure that?

You sir are correct

 

[perfor8]

If it's mine? With a search warrant.

 

[338Shooter]

Rod down the barrel against a closed bolt face and any muzzle attachments removed.

 

[CHenry]

There is an overall gun length too from tip of barrell to the butt of the stock...IIRC?
26" I think?

 

[furlong222]

everyone is correct....including perfor8....

 

[forindooruseonly]

Don't measure overall length on the diagonal, get a yardstick and measure parallel to the barrel. The end of the barrel to the furthest point on the stock needs to be 26 inches. If your gun is measured on a diagonal from muzzle to the toe, it'll read longer than it is. Been people charged for possession of a SBS for mismeasuring on the diagonal.