Sig Sauer MCX Rattler LT SBR | .300 AAC Blackout | 6.75 in

The SIG Sauer MCX Rattler LT SBR is a compact, modular short-barreled rifle chambered in .300 AAC Blackout. It features a cold hammer-forged 6.75 inch barrel, fully ambidextrous controls, and a folding stock for reduced carry length. The Rattler LT retains MCX compatibility with interchangeable barrels and handguards while offering a short-stroke piston operating system tuned for suppressed and unsuppressed use. Pair this platform with a Trijicon MRO or similar 1x red dot optic (well under $1,000) for fast target acquisition and durable performance.

Common applications for this build include short-range precision work and suppressed training where a compact, modular rifle is needed.

Product Specifications

• The manufacturer is Sig Sauer.
• The model is listed as MCX.
• The product type is a Short-Barreled Rifle (SBR).
• The caliber is .300 AAC Blackout.
• The action is Semi-Auto.
• The barrel measures 6.75 inches.
• The barrel material/type is Cold Hammer Forged Carbon Steel.
• The rate of twist is 1-in-5.
• The standard magazine capacity is 30 rounds.
• The package includes 1 x 30‑round magazine.
• The handguard is M-LOK aluminum.
• The stock type is Folding.
• The operating system is a Short-Stroke Piston.
• The unloaded weight is approximately 5.8 lbs.
• The UPC is 798681682676.

The MCX Rattler LT combines modular MCX compatibility with a compact form factor and controls tuned for ambidextrous use. Its cold hammer-forged barrel, two-stage match-style trigger, and suppressor-ready flash hider make it suitable for users who need a short, repeatable platform that accepts MCX barrels and accessories. The folding stock and included 30‑round magazine simplify transport and mission-specific configuration.

Related Videos: