12 Gauge

12 Gauge Shotguns are normally found with 2 3/4″ or  3″ chambers.  with lengths of 18″ to 32″. Shotguns use many of the same actions as rifles—the pump-action, semi-automatic, and bolt-action. They also use a break-action as either a single barrel or double barrels. The double barrels can be arranged horizontally (side-by-side) or vertically (over-under).

There are four common types of shotgun actions:

• Bolt-action
• Pump-action
• Semi-automatic action
• Break-action

*Break-action is the only type of Shotgun that can use the Adapters we make and sell

A 12–gauge shotgun, nominally 18.5 mm (0.73 in), can range from a tight 18 mm (0.71 in) to an extreme overbore of 20 mm (0.79 in).