Sig Sauer M400 Tread Showing the single result Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sale! IN STOCKSig Sauer M400 5.56x45mm, 11.5″ Barrel, Black, Magpul BSL Brace, 30rd $999.99 Original price was: $999.99.$559.99Current price is: $559.99. Add to cart