The T-62 is a Soviet main battle tank intended as armoured support for the Red Army's motor rifle divisions. When it was introduced, it was the first production tank to have a smoothbore gun, which could fire armour-piercing fin-stabilized discarding sabot (APFSDS) rounds at higher velocities than rifled guns. In all other aspects it is essentially an uparmoured, upengined and more compact development of the venerable T-55A. The loader's hatch has mounts for an anti-aircraft DShK Machinegun, though T-62s built from 1971 and onwards include them from the factory floor. It was later vastly improved, and the upgraded model was put into parallel production as the T-64. Thanks to Soviet military aid, the Oceanykan People's Army is receiving large amounts of T-62s to replace older and less capable designs such as the FV301 Vickers Medium Cruiser Mk. I. Some of these tanks mysteriously went missing and later appeared in the hands of pro-Soviet and pro-government groups.