Description
The SIG SAUER M400 TREAD is a practical, do-it-all AR-15 in 5.56 NATO, and this V2 California model brings the upgraded TREAD handguard and trigger to shooters in the Golden State. A 16" stainless steel barrel with a 1:8 twist runs on a mid-length direct impingement gas system, while the free-floating TREAD M-LOK handguard and 3-port muzzle brake help keep shots steady and recoil manageable. The SIG 2-Stage Matchlite Duo flat trigger gives a clean, predictable break.
To meet California requirements, SIG builds this rifle in a featureless configuration using a CA-compliant fin-style grip and a Magpul MOE fixed stock, paired with a 10-round magazine. Ambidextrous safety and magazine release controls, an integrated QD mount, and an optics-ready flat-top upper let you set it up your way. Order online and pick it up at Brute Dynamics in Thousand Oaks, CA after your DROS clears.
Key Features
- Factory California-compliant featureless configuration with fin-style grip and Magpul MOE fixed stock
- 16" stainless steel barrel with 1:8 twist and 1/2x28 threads
- 3-port muzzle brake to tame recoil and muzzle rise
- Mid-length direct impingement gas system for smooth cycling
- TREAD Enhanced free-floating M-LOK alloy handguard
- SIG 2-Stage Matchlite Duo flat trigger
- Ambidextrous safety and magazine release with integrated QD mount
- Optics-ready flat-top upper receiver
What’s in the Box
- SIG SAUER M400 TREAD V2 California rifle
- One 10-round polymer magazine
Specifications
| Caliber | 5.56 NATO |
|---|---|
| Capacity | 10+1 rounds |
| Action | Semi-automatic |
| Operating System | Mid-length direct impingement |
| Barrel Length | 16" |
| Barrel | Stainless steel |
| Twist | 1:8 |
| Muzzle Thread | 1/2x28 TPI, tapered shoulder |
| Overall Length | 35.75" |
| Weight | 6.5 lbs |
| Receiver | Black anodized aluminum |
| Handguard | TREAD Enhanced M-LOK, black alloy, free floating |
| Sights | Optics ready (none included) |
| Stock | Magpul MOE fixed carbine stock |
| Grip | California-compliant fin-style grip |
| Muzzle | 3-port muzzle brake |
| Trigger | SIG 2-Stage Matchlite Duo, flat |
| Safety | Ambidextrous |
| Finish | Black |
| Manufacturer Part # | RM400-16B-TRD-V2-CA |
| UPC | 798681717972 |
California Purchase Information
- California compliance: This M400 TREAD is California compliant in a featureless configuration: it uses a fin-style grip that prevents a pistol grip hold and a Magpul MOE fixed stock, and it ships with a 10-round magazine. Altering the configuration (for example, adding a conventional pistol grip, adjustable stock, flash suppressor or other restricted features) may create an illegal assault weapon under California law.
- Who can buy: Purchasers must be at least 21 years old (required for semi-automatic centerfire rifles in California), hold a valid California Firearm Safety Certificate (FSC) and provide proof of California residency.
- Background check & waiting period: All sales are processed through DROS (Dealer Record of Sale) with a California DOJ background check and a mandatory 10-day waiting period. Pickup must be completed within 30 days of the DROS.
- Pickup / transfer only: Firearms are delivered in person at our Thousand Oaks store, or transferred through a licensed California firearms dealer. We do not ship firearms directly to individuals.
- Magazines: Ships with California-legal magazines limited to 10 rounds. Large-capacity magazines (over 10 rounds) cannot be sold or delivered in California.
- Taxes & fees: California’s 11% firearm and ammunition excise tax, sales tax and state DROS fees apply and are collected at the time of transfer.
- Safety device: A California DOJ-approved firearm safety device (lock) or proof of an approved gun safe is required with every firearm purchase.
Safe storage: Firearms must be stored securely and kept out of the reach of children and prohibited persons. Under California law, you may be guilty of a crime if a child or prohibited person gains access to a firearm that was not stored safely.
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Note: Cerakote and custom work options are completed after the firearm is registered to you through DROS.