2002 · ソースブック（プレイを拡張するルール／オプション）
Ultramodern Firearms
This d20 Modern supplement catalogs more than 350 modern firearms and variants, from pistols and submachine guns to assault rifles, machine guns, and other military weapons. Each entry includes game statistics, descriptions, historical context, and rules for distinctive features. Additional rules cover ammunition types, weapon reliability, bipods, folding stocks, adjustable fittings, custom scopes, weapon feats, and vitality point damage. An index helps select firearms by features, while a reference table lists weapons used by military, police, and special operations organizations.
スキルベース（スキルを購入または獲得）属性／ステータス制（STR、CON、PERなど）レベル制（XPを獲得してレベルアップ）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。