Catalyst Game Labs have released the free BattleTech Quick-Strike Cards: Introductory Set.
From their website:
The year is 3039, and mankind is at war. At the pinnacle of military technology is an avatar of armor and weapons: the BattleMech. On the battlefields of a thousand worlds, the warlords who reign supreme fight to reclaim the mantle of the fallen Star League in the name of their House and their honor.
Quick-Strike Cards: Introductory Set provides players with the means to create easy-to-handle-and-store data cards featuring the 24 classic BattleMech designs from the BattleTech Introductory Box Set. Each card includes the ‘Mech’s image, manufacturing data, and gameplay stats for use in BattleTech miniature wargames using the Quick-Strike Rules set found in Strategic Operations, or can be used as reference cards for games using the BattleForce rules set found in the same core rulebook.