Many domestic and foreign companies made them.
You bet. Available with 26", 28" or 30" barrels. sales@countrygunsmith.net
$1000 to $2000 depending on condition.
29 years old; 100-2000 USD
around 28 million barrels
Apologize for the late response to your question You would need to get a quote from the Browning Custom Shop. Not all O/Us can be fitted with dual guage barrels. Try the link below to contact Browning.
It depends on the Manufacturer, model, and series. I don't see why you couldn't change the barrel size if you find the barrels the same as the 20 inch models. A gunsmith should verify that the headspace is correct with the replacement barrel. The barrel length isn't the concern - it is the fit at the breech that might be off. If there is too much clearance between the end of the barrel and the standing breech, you might be unpleasantly suprised.
About $550
August 28, 1998
The Late Late Show with Craig Kilborn - 1999 - 1999-06-28 was released on: USA: 28 June 1999
The Late Late Show with Craig Kilborn - 1999 - 1999-07-28 was released on: USA: 28 July 1999
The Late Late Show with Craig Kilborn - 1999 - 1999-09-28 was released on: USA: 28 September 1999
The Late Late Show with Craig Kilborn - 1999 - 1999-12-28 was released on: USA: 28 December 1999