 The driver is seated on the left side of the hull, towards the front with the vehicle commander positioned directly behind him in a raised, fixed, armored cupola outfitted with vision blocks for situational awareness, and his hatch.The cupola is ringed by a skate mount that can be used to fix a PKT machine gun which can be configured to fired remotely with the crew buttoned down.The 2S4 has a slow rate of fire, only one round per minute.