From the back of the book:
"As wars continue to flare across the Inner Sphere and Clan Homeworlds, every faction pushes forward with new military developments, fielding cutting-edge equipment, from new personal weapons to battle armor and ProtoMechs.
Combat Equipment is a companion volume to both Classic BattleTech and Classic BattleTech RPG. Providing a plethora of new tools for the battlefield, Combat Equipment also contains a rules expansion allowing players to build non-combat vehicles from buses to trains and large atmospheric craft to super-large wet navy vessels. Also included: a full technical readout section detailing fourteen new battle armor designs in various stages of prototype development; eight new ProtoMechs; and pre-printed record sheets for the battle armor and ProtoMech designs."