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Sig Sauer RM400 Tread Semi-Auto 5.56 16″ Rifle


The Sig Sauer M400 Tread Semi-Auto Rifle operates with a direct impingement gas operating system with rotating locking bolt. The M400 Tread semi-automatic rifle comes with a 6-position Magpul SL-K collapsing stock and a free-floated M-LOK handguard. The rifle operates with a mid-length gas system, a single-stage polished and hard-coat trigger, and ambidextrous controls. The 16″ stainless steel barrel comes equipped with an open-prong flash suppressor. The 7075 aircraft grade aluminum forged lower receiver features an anodized black finish. A receiver Picatinny rail allows you to attach optic sights. The Sig Sauer M400 Tread Semi-Auto Rifle functions with both 5.56 x 45 mm NATO and .223 Rem. ammo, and is compatible with most M16-type magazines.

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Sig Sauer RM400 Tread Semi Automatic Rifle

  • Action: Semi-Auto
  • Barrel Length: 16″
  • Caliber: .223 Rem / 5.56 NATO
  • Capacity: 1 + 30 rd.
  • Finish: Black
  • Overall Length: 30.8″
  • Sights: None
  • Stock Description: Magpul SL-K Telescoping Stock
  • Twist: 1:8″
  • Weight: 7lbs
Action Type






SKU: 14689 Categories: , ,

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