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SIG Sauer M400 TREAD Semi-auto 5.56mm 16" Barrel 30+1 Rounds
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$1001.99
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SKU: WX2*0748110
Overview
Built for shooters who want a capable AR-pattern rifle with a more refined setup, this model combines a 16-inch stainless steel barrel, free-floating M-LOK handguard, and Matchlite Duo 2-stage trigger in an optics-ready platform. The ambidextrous safety selector and magazine release, reduced-angle pistol grip, and 6-position Magpul SL-K stock support a more adaptable shooting experience. It is chambered in 5.56 NATO and includes one 30-round magazine, making it a practical option for range use, duty applications, or defensive roles. The threaded muzzle with SIG 3-prong flash hider adds to the rifle’s ready-to-configure design without overcomplicating the package.
Why Hunters Choose the Sig Sauer
Free-floating Tread-enhanced
M-LOK handguard supports accessory mounting
Optics-ready Flat-top
Upper allows straightforward sight or
Sig Matchlite
Duo 2-stage flat blade trigger
Ambidextrous Safety
Selector and mag release improve
6-position Magpul
SL-K telescoping stock adds adjustable
Key Features
- Chambered in 5.56 NATO with a 16-inch stainless steel barrel and 1:8 twist.
- Mid-length direct impingement gas system for the M400 TREAD platform.
- Free-floating TREAD-enhanced M-LOK handguard.
- Optics-ready flat-top upper for accessory mounting.
- SIG Matchlite Duo 2-stage flat blade trigger.
- Ambidextrous safety selector and magazine release.
- Includes one 30-round polymer AR-15 magazine.
Best Used For
- Hunters wanting an AR-pattern rifle for range sessions and general field use.
- Users who prefer a 16-inch 5.56 NATO rifle with a mid-length gas system.
- Shooters needing optics-ready setup with free-floating M-LOK handguard support.
- Left- or right-handed users who value ambidextrous safety and magazine release.
- Those wanting a compact, adjustable rifle with included 30-round magazine.
Specifications
| Action | Semi-auto |
|---|---|
| Barrel Length | 16" |
| Barrel Material | Stainless steel |
| Caliber | 5.56mm |
| Capacity | 30+1 rounds |
| Chambering | 5.56 NATO |
| Gas System | Mid-length direct impingement |
| Handguard | Free-floating TREAD-enhanced M-LOK handguard |
| Included Magazine | 1 x 30-round polymer AR-15 magazine |
| Magazine Release | Ambidextrous mag release |
| Muzzle Device | SIG 3-prong flash hider |
| Pistol Grip | Reduced-angle pistol grip |
| Safety Selector | Ambidextrous safety selector |
| Sling Mount | Integrated QD sling mount |
| Stock | 6-position Magpul SL-K telescoping stock |
| Thread Pattern | 1/2x28 TPI |
| Trigger | SIG Matchlite Duo 2-stage flat blade trigger |
| Twist Rate | 1:8 |
| Upper Receiver | Optics ready flat-top upper |
Pros
- Free-floating TREAD-enhanced M-LOK handguard supports accessory mounting flexibility.
- Optics-ready flat-top upper allows straightforward sight or optic setup.
- SIG Matchlite Duo 2-stage flat blade trigger offers a refined trigger setup.
- Ambidextrous safety selector and mag release improve left- or right-handed handling.
- 6-position Magpul SL-K telescoping stock adds adjustable length-of-pull options.
- Includes one 30-round polymer AR-15 magazine for immediate use.
Considerations & Trade-offs
- Chambered in 5.56 NATO, so ammunition selection should be matched to that chambering rather than assuming broader caliber flexibility.
- The 16" barrel and mid-length direct impingement setup reflect a general-purpose AR configuration, but they do not make this a dedicated long-range or specialized hunting rifle.
- The rifle is optics ready, but an optic is not included and will need to be selected separately.
- It ships with one 30-round magazine, which may not align with magazine-capacity restrictions in some hunting or local-use settings.
Suggested Comparisons
- Semi-automatic AR-style rifles
- 5.56 NATO rifles
- Optics-ready rifles
- AR-15 magazines and accessories
Suggested Accessories
- Magpul-compatible AR-15 magazines
- Optics for flat-top upper receivers
- QD sling attachments
- AR-15 cleaning kit
Frequently Asked Questions
What comes included with the SIG Sauer M400 TREAD?
The rifle includes one 30-round polymer AR-15 magazine.
Is the M400 TREAD ready for optics?
Yes. The long description lists it as optics ready with a flat-top upper.
What type of trigger does this rifle use?
It uses the SIG Matchlite Duo 2-stage flat blade trigger.
Does the M400 TREAD have ambidextrous controls?
Yes. The source data lists an ambidextrous safety selector and mag release.
What stock and handguard setup does it have?
The rifle features a 6-position Magpul SL-K telescoping stock and a free-floating TREAD-enhanced M-LOK handguard.