SIG M400 TREAD 5.56 NATO Rifle


Caliber: 5.56 NATO
Barrel Length: 16 in.
Overall Width: 2.5 in.
Overall Height: 7.5 in.
Overall Length: 30.8 in.
Approximate Weight: 7 lbs.
Rate of Twist: 1:8
Action Type: Semi-Auto
Frame Finish: Anodized Black
Barrel Material: Stainless Steel
Barrel Finish: Natural Stainless
Frame Material: 7075 Aluminum
Trigger: Single Stage Polished/Hard-Coat Trigger



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The SIG M400 TREAD 5.56 NATO Rifle is a tactical-style rifle that offers versatile performance and customization. Ambidextrous controls on this AR-15 rifle allow use by both right- and left-handed shooters. A Magpul SL-K 6-position telescoping stock offers an adjustable length-of-pull for more comfortable and accurate shooting. As a 5.56 NATO rifle, this Sig Sauer is capable of chambering both 5.56 NATO and .223 rounds. A mid-length direct impingement gas system cycles gas back through the barrel for smoother auto-loading and semi-auto action. This tactical rifle features an optics-ready rail and free-floating handguard for mounting accessories like sights and grips. With an included 30 round mag, the SIG M400 TREAD NATO 5.56 Rifle delivers a comfortable, customizable experience right out of the box.


  • Optics-ready mounting rail
  • Free-floating M-LOK handguard
  • Includes one 30 round polymer magazine
  • Mid-length direct impingement gas system
  • Magpul SL-K 6-position telescoping stock for adjustable shooting
  • Ambidextrous controls allow use by both left- and right-handed shooters


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