From the post:
Following on that success, Catalyst Game Labs, as part of BattleTech’s 30th anniversary, is pleased to announce the launch of a line of Lance Packs, making it easier than ever to bring additional action to your gaming table.
The line will start, following the return of the Introductory Box Set to retailer shelves, with the Assault Lance Pack and Pursuit Lance Pack. Future releases will occur every two to three months there after throughout 2015. Each $19.99 Lance Pack includes four plastic BattleMechs in the same great quality as those from the Introductory Box Set. With no parts to assemble (beyond painting if you want to add your favorite camo scheme to the mix), these are ready-to-play as soon as you open a box.