SRD556-QD View cart “Sig Silencer SRD556-QD 5.56mm, Taper Lok W/ Fast Attach Muzzle Device, 1/2×28, Black” has been added to your cart. 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 Silencer SRD556-QD 5.56mm, Taper Lok W/ Fast Attach Muzzle Device, 1/2×28, Black $632.49 Original price was: $632.49.$569.24Current price is: $569.24. Add to cart