The receiver has a dovetail rail for mounting a telescopic sight. Sighting was by a straight telescopic sight. It has some telescopic sight attachment problems. It also features a double square bridge for mounting a telescopic sight. Ranging is manual and conducted through the gunner's M97A1 telescopic sight. The cylinder had two shallow grooves to accept a telescopic sight. The maximum aiming distance offered by the optical telescopic sight and iron sights is . The PSL was originally issued with the type 1 version of the LPS telescopic sight. The gunner had a rangefinder and a periscope telescopic sight. Some tanks had a vertically stabilised TOP-1 gun telescopic sight. The only difference between the two versions is the mounting system for the telescopic sight. This ergonomic problem was solved by mounting the telescopic sight relatively high above the receiver. The gunner would then bring the target into the M5 telescopic sight. A telescopic sight can have several adjustment controls. They get around impermissible impact shifts by laboriously hand-adjusting every military grade telescopic sight.