TANDEMKROSS Cthulhu Lower Build Options
The TANDEMKROSS Cthulhu lower gives Ruger Mark IV 22/45 owners a different path than upgrading the factory polymer lower one part at a time. It comes assembled with the trigger, safety, thumb rest, slide lock, magazine release, and other controls already installed. Earlier versions of this product used the TANDEMKROSS Kraken lower name. My original … Read more