Homemade Quad Barrel Shotgun - QB12

This is a Simple HOMEMADE Quad Barrel Shotgun - QB12
A double-barreled shotgun is a shotgun with two parallel barrels, allowing two shots to be fired. Modern double-barreled shotguns, often known as doubles, are almost universally break open actions, with the barrels tilting up at the rear to expose the breech ends of the barrels for unloading and reloading. One significant advantage that doubles have over single barrel repeating shotguns is the ability to provide access to more than one choke at a time. Some shotgun sports, such as skeet, use crossing targets presented in a narrow range of distance, and only require one level of choke. Others, like sporting clays, give the shooter targets at differing ranges, and targets that might approach or recede from the shooter, and so must be engaged at differing ranges.
Since there is no reciprocating action needed to eject and reload the shells, doubles are more compact than repeating designs such as pump action or lever-action shotguns.