Just totally ignore that the S300 hasnt been produced since 2011 and has been replaced in the Russian military by the TOR-M1 9A331-1. Former Soviet Republics retain the bulk of the S300s still in service with some in use by other former Soviet client states.

The TOR-M1 9A331-1, NATO code designation SA-15 Gauntlet) is a mobile, integrated surface-to-air defense missile system designed and manufactured by the Russian Defence Industry. The TOR-M1 is intended for effective defense of troops, civilian and industrial facilities from current and future air attack weapons, primarily high-precision weapons, as well as from aircraft, helicopters, cruise missiles, guided aerial bombs and remotely piloted vehicles. The basic component of the system is a combat vehicle mounted on a cross-country tracked chassis of the intermediate weight category. The TOR-M1 combat vehicle can detect aerial targets on the move and launch air defense missiles at two highest-threat targets from a short halt. The TOR-M1 can be shipped by any type of transport, including aircraft. The TOR-M1 is capable of operating in an intensive aerial jamming environment. The TOR-M1 combat vehicle can operate autonomously, firing from stationary positions or on the move. Set-up time is rated at 3 minutes and typical reaction time, from target detection to missile launch is 5-8 seconds. Reaction time could range from 3.4 seconds for stationary positions to 10 seconds while on the move. Each fire unit can engage and launch missiles against two separate targets.

https://www.armyrecognition.com/russia_russian_missile_system_vehicle_uk/tor-m1_9a331_sa-15_gauntlet_technical_data_sheet_specifications_information_description_pictures_uk.html