Sig Sauer MCX Rattler LT | 5.56 NATO | PMCX-556N-7B-LT-PCB

The Sig Sauer MCX Rattler LT is a compact, modular AR-style pistol chambered in .223 Rem / 5.56 NATO that emphasizes ambidextrous controls and modular compatibility with MCX components. It ships with an M-LOK handguard, a folding pistol brace, a SIG QD suppressor-ready flash hider, and one 30‑round magazine. For a practical optic choice under $1,000 that retains rapid target acquisition on a short-barreled platform, consider a 1x red-dot such as the Vortex SPARC AR. Typical applications include close-range target shooting and competitive pistol-carbine stages.

Product Specifications

• The manufacturer part number is PMCX-556N-7B-LT-PCB.
• The caliber is .223 Rem / 5.56 NATO.
• The action is Semi-Auto.
• The firearm ships with one 30‑round magazine.
• The optic footprint is PICATINNY.
• The handguard style is M-LOK.
• The muzzle device is a SIG QD suppressor-ready flash hider.
• The frame material is aluminum (alloy).
• The finish is black.
• The grip material is rubber.
• The stock type is a folding pistol brace.
• The magazine type is removable and the package includes 1 x 30‑round.
• The listed weight is 88 ounces.
• The safety type is listed as thumb.
• The UPC is 798681699766.

The MCX Rattler LT pairs modular MCX compatibility with user-focused controls: fully ambidextrous controls, an adjustable gas piston for suppressed or unsuppressed use, and a flat-blade trigger for consistent trigger break. Its compact footprint and M-LOK handguard provide room for accessories while remaining maneuverable for close-range work and competition use. If you value a compact, well-dressed AR pistol chassis that integrates modern features without excess, the MCX Rattler LT delivers a capable, adaptable foundation for a wide range of short-barrel applications.

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