Sig Sauer Sig M400 Tread 5.56mm Nato 16in 30rd Semi Automatic

The Sig Sauer SIG M400 TREAD rifle brings the M400 TREAD series into focus as a ready-to-run AR-15 platform built for range days, training, and duty use, featuring a 16" stainless steel barrel chambered in 5.56 NATO with a 1:8 twist for reliable stabilization of common bullet weights. The aluminum optics-ready upper and free-floating M-LOK handguard with lightening cuts keep weight down while allowing modular accessory placement, and the mid-length gas system softens felt recoil and improves timing for follow-up shots. Controls are ambidextrous, the polished/hard-coat single-stage trigger delivers a consistent break for precise shot placement, and the Magpul SL-K six-position telescoping stock offers adjustability for shooters of different builds or gear. TREAD-branded extras like the three-chamber compensator and an aircraft-grade ambidextrous charging handle complement the rifle's balance between durability and ergonomics, making it suitable for sport shooting, tactical drills, and varmint work where quick handling and repeatable accuracy matter. Weighing about 7 lbs with an overall length near 30.8 inches and built on the proven direct impingement operating system, this SIG Sauer rifle is a versatile semi-auto option for shooters looking for a modern, adaptable AR-style package.