Sig Sauer Sig M400 Enhanced 5.56x45 NATO Rifle RM400-16B-EC
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Aug 26, 2026
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The accurate Sig M400 Enhanced 5.56x45 NATO is a true AR platform tactical rifle. Features include a 16" nitride treated barrel for corrosion resistance, black polymer Magpul MOE forend, grip and collapsible stock, and a 7075-T6 aircraft grade aluminum forged lower receiver for durability and reliability. Sig Sauer Sig M400 Enhanced 5.56x45 NATO Rifle RM400-16B-EC
