The gauge system of sizing shotgun barrels is an old one. It refers to the number of round lead balls in a pound that will fit the inside of the barrel. A 12 gauge shotgun has a barrel that is the size of a round lead ball that is 1/12th of a pound. A 10 gauge, 1/10th of a pound, 16 g, 1/16th of a pound, and so one. The SMALLER the gauge, the larger the barrel. You should note that the .410 is NOT a gauge, but an actual measurement.
12
12 gauge the higher the gauge the thicker the item is
12 gauge is thicker than 14 gauge.
12 gauge is thicker than 20 gauge. The lower the gauge, the thicker the sheet metal or wire.
12 gauge by far
The 12-gauge is thicker.
Some are 12 gauge, some are 16 gauge. The MX16 is a 12 gauge frame; same frame size for both gauges.
12 gauge Springfield Arms 1916
12 gauge
No
The term 12 gauge is used to describe the caliber(bore diameter)of your shotgun.A 12 gauge barrel is 72 caliber,but the word gauge is used so people can determine you are talking about a shotgun,instead of a rifle.
12 has a bigger bore.