SIG Sauer M400 Trd V2 5.56 NATO 11.5" Threaded Barrel Carbine

The SIG Sauer M400 Tread V2 5.56 NATO 11.5" Threaded Barrel Carbine is purpose-built for operators who demand a compact, modular platform without compromise on reliability. Designed for both tactical professionals and civilian shooters, this semi-automatic carbine bridges the gap between a full-length rifle and a pistol-caliber platform, making it ideal for home defense, law enforcement duty, and precision shooting applications. The 11.5-inch threaded barrel enables rapid suppressor integration and muzzle device customization, giving shooters flexibility in noise signature and recoil management.

Built on SIG's proven piston-driven operating system, the M400 Tread V2 delivers reliable cycling in adverse conditions while reducing carrier tilt and extending component life compared to direct impingement designs. The threaded barrel features a 1/2x28 pitch, the NATO standard for 5.56 and .223 Remington ammunition, allowing integration with most commercial suppressors and muzzle brakes on the market. The compact 11.5-inch configuration maintains velocity and reliability while reducing overall length to approximately 31.5 inches with a carbine stock, making it maneuverable in tight quarters without sacrificing accuracy at intermediate distances.

Law enforcement tactical teams, military support personnel, and civilian operators seeking a short-barreled rifle alternative will find the M400 Tread V2 a robust solution for CQB and room-clearing scenarios. The modular Picatinny rail system accommodates optics, lights, and laser systems without additional adapters, and the piston system pairs seamlessly with suppressors for duty or training use. Shooters should verify any suppressor's barrel thread compatibility and consult local regulations, as NFA registration may be required depending on jurisdiction and muzzle device configuration.