THIMBLE WITH LINE OF SIGHT INSERTED INTO BACKSIGHT AND FORESIGHT

摘要

PURPOSE: A thimble with line of sight makes it easy to adjust to a cross line through a backsight and foresight on aiming of a handgun. CONSTITUTION: A thimble-shaped iron insert has a steel wire horizontally connected to correspond with the end of a foresight and the other wire vertically bisecting the foresight. A thimble may has a transparent glass plate with lines engraved with hydrogen fluoride and an iron or plastic cover. The thimble may be fixed with instantaneous adhesive to prevent the thimble from being lost during shooting or carrying. The zero-point correction to a rifle or a handgun should have been done prior to use the thimble.