The Sig Sauer MCX Rattler LT is a compact AR-style pistol configured for close-quarters and range use. It is chambered in .223 Rem / 5.56 NATO and built to provide a modular, lightweight platform for shooters who need a compact, accessory-ready handgun. The Rattler LT emphasizes modularity and compatibility with standard MCX barrels and handguards.

Key Specifications

• The barrel measures 7.75 inches for compact handling and close-range use.
• The firearm is chambered in .223 Rem / 5.56 NATO.
• The action is Semi-Auto to match typical AR-style pistol operation.
• The package includes a removable magazine with a 30-round capacity.
• The firearm is equipped with a folding pistol brace as the stock configuration.
• It features an M-LOK handguard for low-profile accessory mounting.
• The muzzle is fitted with a SIG QD SR flash hider.
• The receiver provides a Picatinny optic footprint for sights and optics.
• The package ships with one 30-round removable magazine.
• The barrel rifling twist rate is 1-in-7″.

Manufacturer-provided text for this model highlights modular compatibility with other MCX barrels and handguards and references ambidextrous controls for bolt catch and bolt release. The listed features make the Rattler LT suitable for compact tactical applications and range work while retaining AR-platform ergonomics and accessory options.

Note: this item includes a 30-round magazine and is subject to state magazine-capacity restrictions in some jurisdictions. Jurisdictions that restrict magazines to 10 rounds include: Hawaii, California, Connecticut, District of Columbia, Illinois, Maryland, Massachusetts, New Jersey, New York, Rhode Island, Vermont, Washington, and Colorado. Additionally, the provided product data indicates the item cannot be shipped directly to California, Rhode Island, or Washington. Verify local laws before purchase.