Finger and Toe Models have released a Big Guns expansion for their recently released KV 12 Super Tank.
From their announcement:
Finger and Toe Models announces the release of the 28mm card stock Bel’s Kitty, the Big Guns, an expansion for Bel’s Kitty to support your armored assaults. Using the parts included you can build either the KV-12P Grom tank destroyer or the KV-12R Shkval assault mortar. This multi-layer pdf is not a standalone kit and requires Bel’s Kitty. The same six camouflage schemes as the original KV-12 are included.
Remember, every Finger and Toe model comes with smoosh assurance: if ya’ll smoosh your Bel’s Kitty, Big Guns, a new one waits your summons from hard drive and printer.