Sig Sauer MCX Rattler LT Pistol .300 AAC Blackout 6.75 in

About this product

The Sig Sauer MCX Rattler LT is a compact, semi-automatic platform designed for situations where a short overall length and modularity are priorities. Chambered in .300 AAC Blackout, this configuration pairs a cold hammer forged, threaded 6.75 inch barrel with a folding pivoting contour brace for a compact footprint. Controls are configured for ambidextrous operation and the receiver includes a Picatinny rail for optics and accessories. The package includes one removable 30-round magazine and is finished in black anodize with polymer furniture.

Key Specifications

• Chambered in .300 AAC Blackout for compatibility with common subsonic and supersonic loads.
• The barrel measures 6.75 inches and is cold hammer forged for durability.
• The barrel is finished in Black Manganese Phosphate and comes threaded 5/8×24.
• The muzzle features a SIG QD SR suppressor-ready flash hider.
• The action is Semi-Auto with a flat-blade 2-stage match trigger.
• The receiver provides a PICATINNY optic footprint for mounting sights and optics.
• This model ships with 1 x 30-round removable magazine included.
• The stock is a Folding Pivoting Contour Brace in black polymer.
• The overall length is 24.75 inches in the configuration listed.
• Controls include fully ambidextrous operation for bolt catch and release functions.

Purpose-built for users who need a compact, modular pistol platform, the MCX Rattler LT blends a short, durable barrel with familiar MCX ergonomics and accessory compatibility. Its threaded muzzle, Picatinny rail, and ambidextrous controls make it adaptable for a variety of non-spectacular, responsible applications where compact handling and reliable function matter.

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