The PTR presents the Midwest Industries Chassis Mil-Spec Tube in Black, a purpose-built, aluminum chassis designed to fit Ruger PC Carbine models chambered in 9mm and .40 cal for enhanced rigidity and modularity. This mil-spec tube delivers a durable, corrosion-resistant black finish and a sturdy frame that supports improved alignment and stability during rapid fire or precision sequences, making it well-suited for competition, range work, and field use. Crafted from high-strength aluminum, the chassis balances lightweight handling with dependable strength, enabling secure mounting of stocks, grips, and accessories while maintaining precise receiver alignment. Its streamlined profile complements the PC Carbines compact architecture, offering a clean, integrated look and dependable performance under demanding conditions. Whether upgrading a factory setup or tailoring a PC Carbine for specific roles, this mil-spec tube helps optimize cheek weld, accuracy, and control, supporting more consistent shot placement across varied shooting scenarios. With new condition and a Black finish that resists wear, the chassis is a practical choice for shooters seeking a reliable, long-term upgrade that preserves maneuverability without compromising fit or function.