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sigm400
The SIGM400 is a family of firearms manufactured by SIG Sauer. The M400 is an air-cooled, direct impingement gas-operated, magazine-fed carbine that is based on the earlier AR-15 rifle. Depending on the variant, it can be chambered for 5.56×45mm NATO or .300 AAC Blackout cartridges, and may have a fixed or telescoping stock.
I have for sale a limited and discontinued Sig Sauer M400 Tread Coil, equipped from factory with a Romeo 5 red dot sight and a foregrip and hand-stop combo along the bottom of the handguard.
The M400's 16" barrel is chambered for 5.56x45mm with a 1:7 twist rate.
This firearm sells in "as is"...