Sig Sauer MCX Rattler LT .300 BLK 6.75" Pistol with Folding Pistol Brace

Sig Sauer MCX Rattler LT .300 BLK 6.75" Pistol with Folding Pistol Brace

Introducing the next evolution in compact firepower: the SIG MCX-Rattler LT. Built to exceed the demands of Special Operations forces, this ultra-compact platform delivers unmatched modularity, precision, and control in a rugged, ambidextrous package. Every detail of the Rattler LT is engineered for adaptability—from its fully ambidextrous controls to its compatibility with all LT barrels and handguards.

At the heart of the system is a cold hammer forged 6.75" barrel, delivering exceptional durability and accuracy in a compact footprint. The short-stroke piston operating system ensures reliable cycling in suppressed and unsuppressed configurations, while the SIG SLX/SLH suppressor-ready flash hider and flat-blade match trigger offer tactical refinement and crisp control. Whether you're clearing tight spaces or customizing for mission-specific needs, the MCX-Rattler LT is your go-anywhere, do-anything solution.

Fully Ambidextrous Controls
Includes ambidextrous bolt catch, bolt release, and safety selector for seamless operation from either side.

Ultra-Compact Barrel
6.75" cold hammer forged barrel offers durability and precision in tight environments.

Modular Compatibility
Interchangeable with all LT barrels and handguards for mission-specific customization.

Adjustable Gas System
Tunable for suppressed or unsuppressed use, optimizing reliability and performance.

SIG Flat Blade Match Trigger
Provides a crisp, consistent break for enhanced shooting control.

Suppressor-Ready Flash Hider
SIG SLX/SLH QD mount ensures fast, secure suppressor attachment.

Lightweight & Compact
Weighs just 5.1 lbs with a folded length of 17.1", ideal for transport and rapid deployment.

Specifications

• Caliber: 300BLK
• Barrel Length: 6.75 in (171.45 mm)
• Barrel Material: Cold Hammer Forged Steel
• Twist Rate: 1:5
• Thread Pitch: 5/8 in -24, Tapered Shoulder
• Action Type: Semi-Auto
• Operating System: Short-Stroke Piston
• Stock Type: AR-Compatible PDW
• Grip Type: SIG Flat Blade Match
• Trigger Type: Match
• Trigger Shape: Flat
• Foreend Type: Alloy
• Accessory Rail: M-LOK / Picatinny
• Magazines Included: (1) 30rd AR-15 Polymer Mag
• Receiver Finish: Black Anodized
• Overall Length: 25.4 in (645 mm)
• Folded Length: 17.1 in
• Overall Width: 2.25 in (57 mm)
• Height: 7.4 in (187.2 mm)
• Weight: 5.1 lb (2.3 kg)
• Forward Assist: No
• Adjustable Gas System: Yes