SIG SAUER M400 TREAD V2 | 5.56 NATO | 16in | RM400-16B-TRD-V2-CA

The SIG SAUER M400 TREAD V2 is a California-compliant AR-style rifle chambered for 5.56 NATO with a 16-inch stainless steel barrel and a 1:8 rate of twist. It uses a mid-length direct impingement gas system and ships with SIG’s 2-stage Matchlite DUO trigger and a single 10-round polymer magazine. For an optic under $1,000 that pairs well with this platform, consider a Vortex Strike Eagle 1-6×24 or an equivalent low-power variable optic optimized for close-to-medium range target work.

This rifle is suited for controlled-range training and magazine-limited competition shooting, and it also provides a capable option for varmint and small-game fieldwork where legal. The M-LOK enhanced free-floating handguard supports accessory mounting while maintaining a slim profile for consistent control.

Product Specifications

• The firearm is chambered in 5.56 NATO.
• The barrel measures 16 inches and is made of stainless steel.
• The twist rate is 1:8.
• The operating system is a mid-length direct impingement gas system.
• The trigger is the SIG 2-Stage Matchlite DUO.
• The forend is a Tread Enhanced free-floating M-LOK handguard.
• The action type is Semi-Auto.
• The capacity is 10 rounds, and the rifle includes one 10‑rd polymer magazine.
• The receiver finish is Black Anodized.
• The grip is listed as a CA-compliant blade.
• The barrel threads are 1/2 in-28 tpi, tapered shoulder.
• The overall length is 35.75 inches.
• The weight is approximately 6.5 lbs.
• This model is designated as California compliant.
• The UPC is 798681717972.

Purpose-built to meet California requirements while retaining familiar M400 controls and ergonomics, the TREAD V2 balances legal compliance with an emphasis on repeatable shooting fundamentals. The Matchlite 2-stage trigger and free-floating M-LOK handguard support consistent follow-up shots and flexible accessory layout for range or competition configurations.

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