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Sig Sauer Tread Sig Sauer Tread and Ammo (2) Sig Sauer Tread (3)
Sig Sauer Tread Sig Sauer Tread and Ammo (2) Sig Sauer Tread (3)
  • Upgraded furniture
  • Mid-length gas
  • Polished trigger
  • Competitive price
  • Handguard could be better
Editor’s Note:

The Sig M400 Tread is a great mid-level AR-15 for those looking for something above an entry-level rifle without breaking the bank. Good furniture, a quality barrel and twist rate, and a decent trigger make this rifle hard to beat its the price point.

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Sig Sauer M400 Tread Specs

Direct Impingement
Barrel Length
16 in
Magazine Capacity
Magazine Included
1 x 30-Round
Magazine Type
5.56 mm NATO
Front Sight
Rear Sight
Overall Length
30.8 in
Flash Hider
Stock Material
7 lbs

Sig Sauer M400 Tread Features

1:8 twist stainless steel barrel
Mid-length gas system
Magpul SL-K stock
Ambidextrous safety
Free-floated handguard
Three prong flash hider
Polished trigger

By The Numbers - Sig Sauer M400 Tread

The stainless steel barrel is capable of MOA accuracy with the right ammo and shooter.
Sig has a reputation for reliable firearms, and our M400 Tread was no exception.
Like most AR-15s, customization options are near-infinite.
The Magpul stock and Sig grip help make this comfortable out of the box.

final verdict

“The Sig Sauer M400 Tread AR-15 is a great mid-level rifle that packs an upgraded handguard and pistol grip. The mil-spec trigger is decent and since it’s an AR there’s limitless further upgrade potentials. Reliability has been great and the price also offers great bang-for-the-buck. If you’re looking to get into the AR-15 game this is a great pick for your first or even second rifle.” – Ken Whitmore

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