Sig Sauer SIG M400-Tread V2 Coil Rifle 5.56mm 30rd Magazine(1) 16" Stainless Barrel w/ROMEO5 GENII, Vertical Foregrip and Barricade Stop
The M400-TREAD V2 COIL builds on the proven foundation of the TREAD series with factory-mounted upgrades that deliver immediate capability right out of the box. Featuring the same enhanced free-floating handguard and 2-stage Matchlite DUO Trigger that define the V2 platform, the COIL edition adds a set of premium accessories designed to maximize performance from the start.
Equipped with a ROMEO5 Gen II compact red dot sight plus an installed M-LOK vertical foregrip and barricade stop, the TREAD V2 COIL is range-ready the moment you are. Each component is purpose-built and factory-fitted to work seamlessly with the rifle, taking the guesswork out of accessorizing your rifle.
The M400-TREAD V2 COIL is furnished with an accurate 16” stainless steel barrel along with a reliable mid-length gas system for smooth operation and reduced recoil. The barrel is fitted with a 3-prong flash hider and has a versatile 1:8 twist rate. Additional standard features include an ambidextrous safety and magazine release along with integrated QD mounts on the lower receiver.
Treated with a black anodized finish for added resistance to corrosion and wear, the M400-TREAD V2 COIL delivers ready-to-go performance with no extra steps required.
- Romeo5 Gen II Compact Red Dot Sight
- M-LOK Vertical Foregrip and Barricade Stop
- 16” Stainless Steel Barrel
- Tread Enhanced M-LOK Handguard
- Mid-Length Direct Impingement Gas System
- 6 Position MAGPUL SL-K Stock
- Ambidextrous Saftey and Mag Release
California Proposition 65 WARNING: This product can expose you to chemicals that are 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












