Classified as a “Firearm” not a shotgun and fully-compliant by Federal BATFE, these 12 gauge models require no Tax Stamp for transfers, where permitted. To buy a 12 Gauge shotgun or 12 gauge pistol or rifle online in Europe,Simply type the list of 12 Gauge guns or best 12 Gauge guns in Europe or guns near me. Hunters and trap shooters understand that the lower the number, the larger the caliber in a gauge-designated shotgun. So a 12 Gauge shotgun will always be a great pick for new people who wants to get into guns. new to firearms, it helps to quickly review how gauges are determined and why a smaller number means a bigger shell. Gauge in determined by the number of lead balls with the same diameter as the barrel that it would take to weigh one pound. In a 12-gauge, which has a diameter of .729 inches, it would take a dozen .729-diameter balls to reach a pound. Making the 12 Gauge Firearm for sale easy and direct.Feel safe to buy a 12 Gauge shotgun/firearm in Europe Today.