The TandemKross Cthulhu lower for the Ruger Mark IV and Mark IV 22/45 in green and black (brand part no. TK26N0461GBY1) is a fully metallic lower that replaces the factory plastic one. TandemKross builds it as a drop-in part, ready out of the box, and it is not serialized. Swapping to metal gives the pistol a more solid feel in the hand, and the green and black finish sets it apart from a stock Mark IV. It is an easy upgrade for Mark IV owners who shoot steel or simply want a sturdier grip frame.

Key Specifications

• It fits the Ruger Mark IV and Mark IV 22/45.
• It is fully metallic, replacing the factory plastic lower.
• It is drop-in ready out of the box.
• It is not serialized, per TandemKross.
• The finish is green and black.

Frequently Asked Questions

Is this lower serialized? No. TandemKross states it is not serialized; it is a drop-in replacement for the factory lower.

Which pistols does it fit? The Ruger Mark IV and Mark IV 22/45.

Buy the TandemKross Cthulhu Lower for Ruger Mark IV and 22/45, Green/Black

An all-metal lower changes how a Mark IV feels in the hand. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more handgun frames.