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Space Launch System, cargo block 2 aka SLS b2 (NASA)

a size and performance-accurate replica of the SLS B2,

a heavy lift rocket designed and developed by NASA, the SLS can lift heavy payloads (supposedly up to 95 tons) to earth orbit, as well as payloads to the moon and Mars. it was most recently used in the uncrewed Artemis One mission.

this is not a reusable rocket, but it works very well with Mechjeb.

please leave feedback in the comments, because my rockets tend to explode.