S-400 Russian antiaircraft system. Plant tour: missile-into-launchtube assembly process

S-400 Russian antiaircraft system. Plant tour: missile-into-launchtube assembly process.

Addendum: this looks like the plant that burned on 16 April 2024, see [0]: "Russia: Military factory Avangard, the main producer of S-300 & S-400 missiles, is on fire in Moscow."

[0] https://twitter.com/igorsushko/status/1780343524963086481/photo/1