Sig Sauer SIGM400 TREAD COIL Rifle for Sale – Advanced Modular Performance
At Weapons Ammo Reloaded, we proudly offer the Sig Sauer SIGM400 TREAD COIL rifle for sale—a high-performance AR-15 platform built with Sig’s legendary engineering and modular TREAD ecosystem. Designed for precision shooters, home defenders, and tactical enthusiasts, this rifle delivers next-level customization, reliability, and accuracy straight out of the box.
Key Features
✔ TREAD COIL Handguard System –
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13.5″ M-LOK compatible for full accessory customization
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Lightweight yet rigid for improved heat dissipation
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Slim profile for comfortable handling
Match-Grade Barrel –
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16″ cold hammer-forged (1:8 twist)
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5.56 NATO / .223 Rem chamber (shoots both)
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Mid-length gas system (smoother recoil impulse)
✔ Enhanced Controls –
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Ambi charging handle & safety
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TREAD enhanced trigger (clean 5.5-lb break)
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6-position adjustable stock
✔ Optic-Ready & Suppressor-Compatible –
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Flat-top upper with Picatinny rail
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Threaded muzzle (1/2×28) for brakes or suppressors
Specifications
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Caliber: 5.56 NATO / .223 Rem
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Barrel Length: 16″ (mid-length gas)
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Overall Length: 32.5″–35.5″ (adjustable stock)
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Weight: 6.7 lbs (unloaded)
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Magazine Capacity: 30+1 (includes 1 Magpul PMAG)
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Handguard: 13.5″ TREAD COIL M-LOK
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Finish: Hardcoat anodized
Why the SIGM400 TREAD COIL?
- Sig Sauer Quality – Battle-proven reliability
- Unmatched Modularity – TREAD system allows easy upgrades
- Better Than Standard ARs – Smoother shooting with mid-length gas
- Ready for Optics/Lights – Full-length top rail & M-LOK slots
Perfect For
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Tactical Training – Balanced handling for CQB & mid-range
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Home Defense – Lightweight & maneuverable
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Competition Shooters – USPSA, 3-Gun ready
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First AR-15 Buyers – Easy to customize as skills grow
Included
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(1) 30-round Magpul PMAG
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TREAD COIL handguard tool
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Owner’s manual
The Sig Sauer SIGM400 TREAD COIL redefines the modern AR-15—available now at Weapons Ammo Reloaded.
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