# Sig Sauer 5 56 NATO Firearms - Guns For Sale

Explore Sig Sauer 5.56 NATO firearms built around proven rifle, carbine, and pistol configurations, including the M400 Tread, MCX Rattler, 516 G2 Elite, and VIRTUS Patrol lines. This selection spans 16 inch rifles, compact 11.5 inch pistols, optic-ready models, and finishes such as FDE, Moss Green, Jungle Green, and black anodized.

Shop Sig Sauer 5.56 NATO options for range use, defensive setups, and tactical-style builds with familiar controls, durable construction, and modern modular features. From the M400 Tread Snakebite SE and Predator 2 to the MCX Rattler LT and VIRTUS Patrol, these firearms cover compact handling, full-length stability, and 30 round configurations.

## Featured Firearms (36 total)

| Product | Caliber | Price |
|---------|---------|-------|
| [SIG M400 Tread Snakebite SE - 5.56 NATO, 16" FDE Rifle](https://gunsnation.com/p/sig-m400-tread-snakebite-se-5-56-nato-16-fde-rifle/UCE3nOprP) | 5.56 NATO | - |
| [Sig Sauer MCX Rattler LT: Compact Tactical 5.56mm Carbine](https://gunsnation.com/p/sig-sauer-mcx-rattler-lt-compact-tactical-5-56mm-carbine/UCE3nOxDM) | 5.56 NATO | - |
| [Sig Sauer M400 Tread V2 TacPac 5.56 NATO 16in](https://gunsnation.com/p/sig-sauer-m400-tread-v2-tacpac-5-56-nato-16in/UCE3nP2PW) | 5.56 NATO | - |
| [Sig Sauer MCX Spear-LT 5.56 NATO 11.5in FDE](https://gunsnation.com/p/sig-sauer-mcx-spear-lt-5-56-nato-11-5in-fde/UCE3nP17T) | 5.56 NATO | - |
| [Sig Sauer M400 5.56 NATO 16in Black](https://gunsnation.com/p/sig-sauer-m400-5-56-nato-16in-black/UCE3nP81q) | 5.56 NATO | - |
| [Sig Sauer MCX Spear LT 5.56 NATO 11.5" Pistol - Coyote Tan](https://gunsnation.com/p/sig-sauer-mcx-spear-lt-5-56-nato-11-5-pistol-coyote-tan/UCE3nOrHb) | 5.56 NATO | - |
| [Sig Sauer M400 Tread Predator 2: Jungle Green 5.56 NATO Rifle](https://gunsnation.com/p/sig-sauer-m400-tread-predator-2-jungle-green-5-56-nato-rifle/UCE3nOm5Y) | 5.56 NATO | - |
| [Sig Sauer MCX 5.56 NATO 16in Black](https://gunsnation.com/p/sig-sauer-mcx-5-56-nato-16in-black/UCE3nOniN) | 5.56 NATO | - |
| [Sig Sauer M400 5.56 NATO 16in Black](https://gunsnation.com/p/sig-sauer-m400-5-56-nato-16in-black/UCE3nOpT7) | 5.56 NATO | - |
| [SIGM400 Tread: 5.56 NATO, 16" Semi-Auto Rifle - Black](https://gunsnation.com/p/sigm400-tread-5-56-nato-16-semi-auto-rifle-black/UCE3nOjlq) | 5.56 NATO | - |
| [Sig Sauer MCX Spear-LT Coyote 5.56 NATO Semi-Auto Rifle](https://gunsnation.com/p/sig-sauer-mcx-spear-lt-coyote-5-56-nato-semi-auto-rifle/UCE3nOr28) | 5.56 NATO | - |
| [Sig Sauer M400 Tread Distressed OD Green 5.56 NATO Rifle](https://gunsnation.com/p/sig-sauer-m400-tread-distressed-od-green-5-56-nato-rifle/UCE3nOsEa) | 5.56 NATO | - |
| [SIG Sauer M400 SDI Tactical Pistol 5.56 NATO, 11.5" Barrel, 30rd](https://gunsnation.com/p/sig-sauer-m400-sdi-tactical-pistol-5-56-nato-11-5-barrel-30rd/UCE3nP0wZ) | 5.56 NATO | - |
| [Sig Sauer M400 Tread V2 5.56 NATO Rifle - Moss Green Precision Shooter](https://gunsnation.com/p/sig-sauer-m400-tread-v2-5-56-nato-rifle-moss-green-precision-shooter/UCE3nOy5s) | 5.56 NATO | - |
| [SIG Sauer M400 Tread V2 Tactical Pistol 5.56 NATO, 11.5" Compact Black](https://gunsnation.com/p/sig-sauer-m400-tread-v2-tactical-pistol-5-56-nato-11-5-compact-black/UCE3nP0wI) | 5.56 NATO | - |
| [Sig Sauer M400 Tread 5.56 NATO 16in Black](https://gunsnation.com/p/sig-sauer-m400-tread-5-56-nato-16in-black/UCE3nP5Bi) | 5.56 NATO | - |
| [SIG Sauer M400 Forge 5.56 NATO 16in Black](https://gunsnation.com/p/sig-sauer-m400-forge-5-56-nato-16in-black/UCE3nPCgk) | 5.56 NATO | - |
| [Sig Sauer M400 Forge 5.56 NATO 16in Concrete Gray](https://gunsnation.com/p/sig-sauer-m400-forge-5-56-nato-16in-concrete-gray/UCE3nPChr) | 5.56 NATO | - |
| [Sig Sauer M400 SDI 5.56 NATO 16in Moss Green](https://gunsnation.com/p/sig-sauer-m400-sdi-5-56-nato-16in-moss-green/UCE3nP1Wq) | 5.56 NATO | - |
| [SIG Sauer M400 Tread V2 5.56 NATO Rifle, 16" Barrel, Black Anodized](https://gunsnation.com/p/sig-sauer-m400-tread-v2-5-56-nato-rifle-16-barrel-black-anodized/UCE3nOy5l) | 5.56 NATO | - |

*Showing 20 of 36 products*

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*Data from [GunsNation](https://gunsnation.com)*