USED Sig Sauer MCX Rattler 5.56 NATO Pistol – 5.5″ Barrel, Folding Brace

Used only one available.

Compact, rugged, and purpose-built for performance — the Sig Sauer MCX Rattler redefines what a short-barreled platform can do. Designed for maximum firepower in minimal space, this Rattler features a 5.5-inch cold hammer-forged barrel chambered in 5.56 NATO, paired with Sig’s renowned short-stroke piston system for unmatched reliability and smooth cycling in confined or suppressed use.

The Rattler’s monolithic upper receiver and M-LOK handguard offer rock-solid stability for optics and accessories, while the skeletonized folding brace keeps it compact without sacrificing control. Ambidextrous controls, a two-position gas piston system, and Sig’s ergonomic grip make it comfortable and intuitive to run in any environment.

Ideal for tactical training, home defense, or range use, the MCX Rattler is engineered for shooters who demand top-tier performance in a discreet, ultra-compact package.

Specifications