One slug's journey through the MMM architecture — ground gun to deep space. Sections cited from the published study.
Gun Line — coilgun freight (bulk mass)Beam Line — maglev + laser-thermal (delicate cargo)Water / steam-tug loop (in orbit)
Slug baseline S-630 (§12.1): 180 kg reentry-hardened shell + 190 kg circularization propellant → ~630 kg net cargo in LEO — water, cryogens, metals, propellant, artillery-grade electronics (§5.1).
Doctrine note: physics figures as published; all $/kg are bands ×2–3 wide with honest midpoints until item 22 closes each figure.