2011 · ソースブック（プレイを拡張するルール／オプション）

GURPS Low-Tech: Instant Armor

This supplement provides armor data for TL0–4 GURPS campaigns, covering the torso, arms, legs, head, neck, hands, feet, and sub-locations such as the abdomen and groin. Tables list suitable materials for each body part and give the technology level, damage resistance, cost, weight, donning time, and Holdout penalty for each piece. Additional tables summarize materials and modifications, while example helmet designs demonstrate how to assemble historical headgear. Optional rules address specialized protection, including armoring only vital areas and sleeping in armor.