Yes
Not a thing
Yes.
Yes. The Mossberg 500A1 is a .12 gauge shotgun.
To determine exact value of a 1904 Marlin 12 gauge pump shotgun, you would actually have to take a number of factors into consideration. The main thing to consider would be the condition of the shotgun.
Any old shotgun stamped "44 Cal." or using the number 44 is chambered for the cartridge which eventually was modified into today's .410 gauge bore. They reportedly fire the .410 ok, but are not as good generally as the true .410 shotgun.
A bolt action shotgun in 12 gauge.
Yes, a 12 gauge shotgun is considered a firearm.
There is no such shotgun gauge.
What is the value oof a .410 gauge shotgun
Standard 16 gauge shotgun shells.
No, an 810 shotgun is not a 12 gauge. The 810 designation typically refers to a specific model of shotgun, such as the Baikal MP-18 or similar, which may have different gauge specifications. The gauge of a shotgun indicates the diameter of the barrel, with 12 gauge being a popular size. Always check the manufacturer's specifications to confirm the gauge of a particular shotgun model.
It is a shotgun with 20 gauges.