USED Sig M400 Tread 5.56x45mm, Original Box, 1 Mag Out of stock. Check back later... Price: $550.00 Description Details Shipping info Manufacturer: Sig SauerModel: M400Origin: UsedCaliber: 5.56x45mm NATOCategory: Long gunModern Sporting RifleRifleGunsStock: 0 This item may be shipped to an FFL near you! The item will be held at our location until we have received a valid copy of your dealer's license.