Sight device for a firearm, in particular for a handgun

A sight device for a firearm, in particular a handgun, comprising:

• a base;
• a sight arm;
• a rear sight slide;
• and
• at least one rear sight piece having a rear sight, wherein the sight arm is fixed to the base in order to be pivotable in a pivot direction relative to the base about a pivot axis extending transversely, in particular perpendicularly, to a sight axis;
• wherein the rear sight slide is arranged on the sight arm in a vicinity of a free end of the sight arm and is displaceable transversely to the sight axis, as well as transversely to the pivot direction relative to the sight arm for an adjustment position, and the rear sight slide is fixable on the sight arm in a set adjustment position;
• wherein the at least one rear sight piece is detachably fixed on the rear sight slide and in a defined position relative to the rear sight slide;
• wherein the rear sight slide on an upper side has a receiver for the rear sight piece, which receiver is open toward an end face of the free end of the sight arm, and has retaining structures into which the rear sight piece
• is insertable in a direction parallel to the sight axis, and in which the rear sight piece is held in a fixed position on the rear sight slide in the pivot direction and in a direction transverse to the pivot direction, and transverse to the sight axis due to the interaction of the retaining structures with matching structures on the rear sight piece;
• and
• wherein a spring-loaded latch piece, which is displaceable in the pivot direction is provided on the rear sight slide, which latch piece comprises a locking section and engages in a locking receiver on the rear sight piece when the rear sight piece is inserted into the receiver.