Tandemkross Tandemized Cthulhu Grip Frame Lower for Ruger Mark IV & 22/45 Black/Red

The Tandemkross Tandemized Cthulhu is an aftermarket grip frame lower built to replace the factory polymer frame on the Ruger Mark IV and Ruger Mark IV 22/45 rimfire pistols. Marketed as a drop-in upgrade, the Cthulhu consolidates the typical piecemeal frame mods into a single component, giving 22/45 and Mark IV owners a more ergonomic, competition-ready platform straight out of the box.

The Cthulhu's defining features include an enlarged trigger guard for use with gloves or larger hands, a hooked trigger guard that adds extra points of contact for a more secure hold during recoil, and a textured backstrap that improves grip security during rapid fire. The lower is finished in Black / Red, giving the Ruger Mark IV and 22/45 a distinctive Tandemized appearance on the range or in competition.

Designed as a drop-in replacement for the factory polymer grip frame on the Mark IV and 22/45, the Cthulhu installs with standard tools and the included instructions, ready to drop onto a compatible Ruger rimfire pistol.