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Sig Sauer M400 THREAD 5.56 16″ Rifle


The New M400 THREAD brings increased performance and capability to one of Sig Sauer’s most popular rifles.


  • Free Floating M-LOK Enhanced Handguard
  • SIG Matchlite 2-Stage Trigger
  • 16” Stainless Steel Barrel
  • Mid-Length Gas System
  • MAGPUL SL-K Telescoping Stock
  • Ambidextrous Safety
  • Lower receiver QD mounts

Availability: 2 in stock

SKU: RM400-16B-TRD-V2 Categories: , , Tag:

The Sig Sauer M400 THREAD features a free-floating M-LOK enhanced handguard that is lightweight yet rigid for extreme control and ease of mounting accessories such as lights and handstops. The lower receiver has an ambidextrous safety for right or left-handed operation and includes an integrated QD mount for easy sling attachment.

Chambered in 5.56 NATO, the M400 TREAD has a 16” stainless steel barrel offering extreme durability and corrosion resistance while improving accuracy. The barrel is also fitted with a 3-prong flash hider and has an extremely versatile 1:8 twist rate.

The M400 TREAD also has a mid-length gas system offering smoother operation and reduced recoil. The new M400 TREAD includes a SIG Matchlite 2-stage trigger for enhanced control and improved accuracy as well as a MAGPUL SL-K telescoping stock for easy adjustment and a customized fit. The new M400 TREAD. All of the freedom, all of the features, with none of the compromises.

Sig Sauer M400 THREAD Rifle Features:

  • SKU: RM400-16B-TRD-V2
  • Caliber: 5.56 NATO
  • Sights: Optics Ready
  • Barrel Length: 16.0 inches
  • Mags Included: (1) 30 Round Polymer Magazine
  • Mag Type: AR-15
  • Action Type: 6-Position SL-K
  • Barrel Material: Stainless Steel
  • Trigger Type: 2- Stage Match Trigger
  •  Twist Rate: 1:8
  • Forend Type: Alloy
  • Grip Type: Polymer
  • Receiver Finish: Hard Coat Anodized
  • Overall Length: 30.8 inches (782 mm)
  • Overall Width: 2.5 inches (64 mm)
  • Height: 7.5 inches (191 mm)
  • Threads: 1/2 inch- 28 tpi
  • Accessory Rail: M-LOK
  • Operating System: Mid-Length Gas System
  • Weight: 7 pounds (3.2 kg)
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M400 TREADSig Sauer M400 THREAD 5.56 16″ Rifle

Availability: 2 in stock

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