The 14.5×114mm (.57 caliber) is a heavy machine gun and anti-materiel rifle cartridge. Originally developed for the PTRS and PTRD anti-tank rifles, it was later used as the basis for the KPV heavy machine gun that formed the basis of the ZPU series anti-aircraft guns. It is also the main armament of the BTR series of armored personnel carriers from the BTR-60 to the BTR-80. The 14.5х114 mm rounds are designed to engage light-armored targets, firing points, and targets located behind small-size shelters at distances up to 1000m, as well as to fire at concentrated troops and transport vehicles at distances up to 2000 m and engage low-flying airborne targets at an altitude up to 2000m. 14.5х114 mm rounds pierce 20 mm armor at up to a 20-degree angle at a distance of up to 300m and set on fire B-70 petroleum located behind the obstacle. It has additionally been utilized for heavy anti-materiel sniper rifles.