Sig Sauer M400 Tread 5.56 Nato 11.5" Pistol


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PLEASE NOTE: If the customer provides the FFL for the order firearms usually ship in 5-7 business days. If we have to contact the FFL and obtain the license please expect 7-14 days processing time. Send all FFLs to FFL@SIMMONSSG.COM

The M400 TREAD pistol is an optics ready, aluminum receiver rifle caliber pistol. The TREAD pistol features a 11.5" Nitride Coated barrel with a free-floating M-LOK handguard, a single-stage polished/hard-coat trigger, ambidextrous controls, a Shockwave Blade multi position pistol brace, and is available in 5.56 NATO.

The TREAD branded accessories include:

  • - M-LOK handguard with lightening cuts to reduce weight, available in 11.5";
  • - Ambidextrous charging handle made of aircraft grade aluminum and a dual roll pin design;
  • - ROMEO5 optic featuring a 2MOA dot with ten illumination settings, MOTAC, and 50k battery life;
  • - Flip-up front and rear iron sights that are easy to install, adjustable, and deploy quickly;
  • - M-LOK front sight adapter with co-witness height made of lightweight aluminum;
  • - Multiple configurations of M-LOK grip kits made of high strength polymer;
  • - Factory upgraded flat blade, single stage trigger.


  • OPERATING SYSTEM: Direct Impingement
  • CALIBER: 5.56 NATO
  • OVERALL LENGTH (IN): 27 in (686 mm)
  • OVERALL WIDTH: 2.5 in (64 mm)
  • HEIGHT: 7.5 in (191 mm)
  • BARREL LENGTH: 11.5 in (292 mm)
  • WEIGHT (OZ): 6 lbs (2.7 kg)
  • TWIST RATE: 1:7
  • MAG TYPE: AR-15

The purchaser of a hand gun must be 21 years of age or older. The purchaser is responsible for knowing his/her state and federal gun laws. Federal gun laws and regulations prohibits the transfer of a handgun to an out of state resident, therefore the "pick up in store" option is not avaliable to non Louisiana residents.

The purchaser of a long gun must be 18 years of age. The purchaser is responsible for knowing his/her state and federal gun laws.


WARNING: Cancer and Reproductive Harm:



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