Firearm with turning sight, barrel of firearm being able to turn about its axis or connected to shaft to turn about line parallel to its axis

摘要

The weapon has a shaft (1) connected to a barrel (2) with a sight (3, 4) mounted on it. The barrel can rotate about its axis or is connected to the shaft so that it can turn about a line parallel to its axis. The barrel may be able to be turned to a maximum of 15 deg from its initial position. There may be an indicator to display the turn of the barrel.