RM400-16B-TRD-CO 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 M400 Tread, CO Compliant, .223/5.56, 16″ Barrel, 10rd, Magpul SL-K Stock $849.99 Original price was: $849.99.$535.49Current price is: $535.49. Add to cart