CMMG 55CA67D Pistol Tube Assembly, Black

The CMMG Pistol Tube Assembly (model 55CA67D) converts adjustable position AR pistol buffer tubes to a smooth-sided pistol tube while allowing reuse of your existing buffer, spring, and castle nut. The kit ships with a pistol buffer tube and an ambidextrous sling receiver end plate, and is described for use on AR-platform pistols. It is intended for builders and owners who want a streamlined, solid mounting interface for pistol-configured uppers and lowers.

Key Specifications

• The model number is 55CA67D.
• The manufacturer is CMMG.
• The finish is black.
• The kit includes a pistol buffer tube and an ambi sling receiver end plate.
• Designed to fit AR-platform pistols.
• Allows reuse of the existing buffer, spring, and castle nut from the firearm.
• Installation requires basic armorer tools and adherence to standard AR maintenance procedures.

This CMMG pistol tube assembly provides a practical, no-nonsense option for builders and owners looking to replace or convert an adjustable buffer tube to a smooth-sided pistol tube. Its straightforward design keeps compatibility with commonly used AR components and simplifies installation for those familiar with basic armorer work, making it a reliable choice for AR-platform pistol builds and upgrades.