The BMP-1 is an amphibious tracked infantry fighting vehicle - the first one to be mass produced. The design combines features of an APC with that of a light tank allowing infantry to operate from the relative safety of the BMP's protected interior increasing infantry mobility and firepower. The BMP-1 was armed with a 73mm 2A28 Grom low pressure smooth-bore short recoil semi automatic gun as well as a 7.62mm PKT machine gun.