SIG SAUER MCX Rattler LT | .300 AAC Blackout | 6.75 in
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SIG Sauer MCX Rattler LT pistol in .300 AAC Blackout with a 6.75 inch cold-hammer-forged barrel, 30-round magazine, aluminum frame and folding pivoting contour brace (MFG# PMCX-300B-6B-LT-PCB).
The SIG SAUER MCX Rattler LT is a compact, modular pistol built on the MCX platform and chambered for .300 AAC Blackout. It uses a short-stroke gas piston system and a cold hammer forged barrel to deliver consistent function in a compact package. The Rattler LT is optic-ready on a Picatinny rail and ships with a folding pivoting contour brace for compact carry and storage. Pair this platform with a reliable red-dot such as the Vortex SPARC AR 2 MOA for quick target acquisition and robust field use under $1000.
Typical applications for this configuration include short-range precision and suppressed shooting from a compact platform, and use as a compact range or training firearm where modularity and low overall length are priorities.
Product Specifications
- The manufacturer is SIG Sauer.
- The model is MCX Rattler LT.
- The caliber is .300 AAC Blackout.
- The action is Semi-Auto.
- The barrel measures 6.75 inches.
- The magazine capacity is 30 rounds.
- The package includes 1 x 30-round magazine.
- The frame material is Aluminum.
- The barrel material is Cold Hammer Forged Steel.
- The barrel finish is Black Manganese Phosphate.
- The optic footprint is PICATINNY.
- The trigger is a Flatblade 2-Stage Match.
- The muzzle is fitted with a SLH/SLX Suppressor Flash Hider.
- The weight is listed as 82 ounces.
- The UPC is 798681699759.
The Rattler LT brings MCX modularity into an ultra-compact package: fully compatible with MCX barrels and handguards, and built around a short-stroke piston system that removes the need for a traditional buffer tube. Its folding brace and Picatinny optic rail make it suitable for shooters who need a compact, configurable pistol for short-range accuracy and suppressed use. The configuration balances maneuverability with the performance characteristics expected from SIG Sauer’s MCX series.
Owners and reviewers commonly praise the MCX Rattler LT for its compact size and modular compatibility with other MCX components.
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