Sig Sauer

Sig Sauer M400 Tread 5.56 NATO 16" 30 Round, Black

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MSRP:$949.99 $849.99
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The M400 TREAD is an optics ready, aluminum frame rifle.  TREAD features a 16” stainless steel barrel with a free-floating M-LOK handguard, a single-stage polished/hard-coat trigger, ambidextrous controls, a Magpul™ SL-K 6 position telescoping stock, a mid-length gas system, and is available in 5.56 NATO.


The TREAD branded accessories include:

- M-LOK handguard with lightening cuts to reduce weight, available in 13” and 15” lengths;

- 3 chamber compensator;

- 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.


Mag Type AR-15
Barrel Length 16 in (406 mm)
Caliber 5.56 NATO
Height 7.5 in (191 mm)
Overall Length 30.8 in [782 mm]
Overall Width 2.5 in [64 mm]
Twist Rate 1:8
Weight 7 lbs (3.2 kg)
Operating System Direct Impingement

Barrel Length: 16 Inches

Caliber/Gauge: 5.56 NATO

Color: Black

Model: M400

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