NFA Notice: This firearm is classified as a Short-Barreled Rifle (SBR) under the National Firearms Act (NFA). Transfer requires ATF Form 4 approval, tax stamp, and applicable waiting period. Ensure compliance with all federal, state, and local laws prior to purchase.

The SIG SAUER MCX Rattler LT SBR in 300BLK is a factory short-barreled rifle built for shooters who want maximum capability in a highly compact platform.

This configuration, model RMCX-300B-6B-LT-SBR, features a 6.75 inch cold hammer forged barrel, 1:5 twist rate, and 5/8x24 tapered shoulder threads, making it exceptionally well suited for suppressed use and optimized performance with both subsonic and supersonic 300 Blackout ammunition.

The MCX Rattler LT operates on SIG SAUER’s proven short-stroke piston system and is equipped with a Folding Minimalist Plus stock, SIG Flat Blade Match trigger, and M-LOK/Picatinny interface. Its AR-compatible PDW layout keeps the rifle compact and maneuverable while preserving the control and handling serious users expect from the MCX platform.

With an overall length of just 24.9 inches and a folded length of 17.1 inches, the MCX Rattler LT SBR is purpose-built for confined spaces, transport efficiency, and modern suppressor-oriented rifle setups.

Each rifle ships in Black Anodized finish and includes one 30-round polymer magazine.

Shop more rifles, magazines, and accessories at Huckleberry Arms:
Rifles | AR15 Magazines | Rifle Magazines

This factory SBR configuration includes a stock and requires NFA approval prior to transfer.