The SIG SAUER MCX RATTLER LT in 5.56x45mm NATO represents a purpose-engineered, compact weapon system designed for rapid deployment and optimized performance in close-quarters and vehicle-borne operations. As a professional-grade AR pistol, the Rattler LT integrates a robust short-stroke gas piston system into a minimal footprint, ensuring operational reliability across diverse environmental conditions and ammunition types, including suppressed fire.
Key Features
Operating System
The MCX Rattler LT utilizes a proven short-stroke gas piston operating system. This design significantly mitigates carbon fouling in the receiver group, promoting enhanced reliability and reducing maintenance cycles compared to direct impingement systems. An adjustable gas block facilitates precise tuning for suppressed or unsuppressed configurations, optimizing cycling and recoil impulse.
Modularity & Ergonomics
Engineered for adaptability, the Rattler LT features a user-configurable architecture. The M-LOK free-float handguard provides extensive mounting points for lights, lasers, and other mission-critical accessories, ensuring robust integration. Ambidextrous controls, including the safety selector, magazine release, and bolt catch, enhance operational efficiency for all users. The pistol is designed for minimal length, facilitating maneuverability in restrictive spaces.
Construction & Materials
Constructed from high-grade materials, the MCX Rattler LT features forged aluminum upper and lower receivers, providing a resilient and lightweight chassis. The 7.75-inch barrel is crafted from a durable steel alloy, designed for consistent precision and extended service life. The system is finished in a hard-anodized black coating, offering superior corrosion resistance and wear durability.
Precision & Reliability
The MCX Rattler LT is configured for dependable function in demanding scenarios. Its integrated design elements, from the self-regulating gas system to the robust receiver construction, contribute to consistent performance and component longevity, positioning it as a highly capable platform for critical applications.
Technical Specifications
Caliber
5.56x45mm NATO
Operating System
Short-stroke Gas Piston, adjustable
Barrel Length
7.75 inches
Receiver Material
Forged Aluminum Alloy
Handguard
M-LOK Free-Float
Finish
Black Anodized
Controls
Ambidextrous Safety, Magazine Release, Bolt Catch









