Sig Sauer MCX Rattler LT 5.56mm SBR 7.75" Barrel - Black

Sig Sauer MCX Rattler LT 5.56mm SBR 7.75" Barrel - Black

Engineered to meet the relentless operational requirements of elite Special Operations forces, the Sig Sauer MCX-Rattler LT SBR redefines personal defense weapon (PDW) capability in an ultra-compact footprint. Chambered in 5.56 NATO and powered by SIG’s battle-proven short-stroke gas piston system, this factory Short Barreled Rifle delivers duty-grade reliability, flat-shooting precision, and maximum terminal effectiveness without the bulk of a standard carbine. Whether deployed for executive protection, vehicle operations, or dynamic home defense, the MCX-Rattler LT offers uncompromising tactical dominance in the tightest spaces.

Built upon the upgraded MCX-LT architecture, this next-generation Rattler introduces full cross-compatibility with the entire lineup of MCX-LT barrels and M-LOK handguards, unlocking unmatched modularity for mission-specific customization. Equipped with fully ambidextrous lower controls—including dual bolt catches and releases—a match-grade flat-blade trigger, and a folding Minimalist Plus stock that stows down to just 18.1 inches, every control surface is tuned for rapid handling under stress. Outfitted factory-standard with SIG’s QD suppressor-ready flash hider, the MCX-Rattler LT SBR is ready to run suppressed out of the box with zero compromises.

Features

Cold Hammer-Forged 7.75″ Barrel:
Features a 7.75-inch cold hammer-forged steel barrel with a 1:7 twist rate, engineered for exceptional barrel life, ballistic consistency, and precision accuracy in an ultra-compact package.

Adjustable Short-Stroke Gas Piston:
Equipped with a dual-position adjustable gas regulator optimized for effortless switching between suppressed and unsuppressed fire, eliminating gas blowback and maximizing cycling reliability.

MCX-LT Modular Architecture:
Fully compatible with the expanded ecosystem of MCX-LT barrels, calibers, and handguards, allowing operators to easily reconfigure lengths or swap calibers to suit operational needs.

Full Ambidextrous Billet Controls:
Features an intuitive ambidextrous lower receiver equipped with dual-sided bolt catch, bolt release, and safety selector levers for seamless operation from either shoulder.

SIG SLX/SLH Suppressor-Ready Flash Hider:
Pre-installed with a 5/8x24 tapered shoulder QD flash hider, providing rapid, direct lockup for SIG Sauer SLX and SLH suppressors while effectively taming muzzle flash.

Match Flat-Blade Trigger:
Fitted with a precision SIG flat-blade match trigger that delivers a crisp, tactile break and rapid reset for lightning-fast, accurate follow-up shots.

Folding Minimalist Plus Stock:
Includes a rugged side-folding stock that locks up rock-solid and reduces the rifle’s overall length to a discreet 18.1 inches for effortless transport and low-profile concealment.

Specifications