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Sig Sauer SIGM400 SDI 5.56 NATO Semi-Auto 16″ Rifle


Sig’s M400 SDI rifle utilizes innovation, performance, and attention to detail that defines other Sig rifles. It is a superior system offering advanced features available right out of the box that was once only found on the after-market. The M400 features a direct impingement gas operating system with a rotating locking bolt, an extended charging handle latch, a flat-top upper receiver, and a built-in tensioning device that eliminates accuracy-robbing play between upper and lower receivers. Ambidextrous controls make the Sig M400 series a perfect fit for right- or left-hand shooters. This SDI model has a carbon steel fluted 16″ nitride coated barrel, brown Cherokee metal finish, black 6-position adjustable stock, and a two-stage match trigger.

Out of stock

Sig Sauer SIGM400 SDI 5.56 NATO Semi-Auto 16″ Rifle

  • Action: Semi-Auto
  • Barrel: 16″
  • Caliber: 5.56 Nato
  • Capacity: 30 Rounds
  • Finish: Coyote
  • Overall Length: 35.25″
  • Scope Mount: M1913 Picatinny Rail
  • Stock: Synthetic Telescoping
  • Twist: 1:8″
  • Weight: 7.73 lbs.
Action Type





SKU: 18583 Categories: , ,

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