The Tandemkross Tandemized Cthulhu Ruger Mk IV & 22/45 Green/Black lower assembly brings a fully upgraded foundation to your rimfire pistol. Built around a striking green anodized frame with black controls and accessories, this lower is configured with Tandemkross performance parts and a forward thumb ledge to enhance control and ergonomics for serious rimfire shooters.

This dedicated lower is ideal for turning your Ruger Mark IV or Mark IV 22/45 into a refined range or competition pistol, giving you a comfortable, contoured grip and enhanced manipulation of the fire controls. Whether you are chasing tighter groups on steel or refining fundamentals in training, this Tandemized Cthulhu lower offers a stable, confidence‑inspiring interface that showcases Tandemkross’s focus on thoughtful design and shooter‑driven innovation.

• Manufacturer: Tandemkross
• Model: Tandemized Cthulhu Ruger Mk IV & 22/45 Green/Black
• Other Features: Green frame with black accessories and forward thumb ledge