SIG Sauer M400 TREAD V2 – RM400-16B-TRD-V2
- UPC: 798681688005
- Manufacturer: SIG Sauer
- Type: Semi-automatic rifle
- Platform: AR
- Caliber: .223 Remington / 5.56 NATO
- Barrel length: 16 inches
- Gas system: Mid-length
- Muzzle device: Factory flash hider
- Finish: Black hard-coat anodized
- Upper and lower receivers: Forged aluminum
- Handguard: Free-floating M-LOK aluminum
- Trigger: SIG Matchlite two-stage
- Safety selector: Ambidextrous
- Stock: Magpul SL-K, six-position adjustable
- Grip: Polymer
- Receiver rail: Full-length Picatinny
- Additional features: Forward assist, dust cover and optics-ready configuration
- Listed accessories: Three 30-round polymer magazines, Firefield Impulse red-dot/red-laser optic and carrying bag.