Sig New 2023 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 MCX-SURG Suppressed Upper Receiver Group, Fits to AR-15 Lower, 11.5″ Barrel, 5.56 NATO $4,299.99 Original price was: $4,299.99.$2,407.99Current price is: $2,407.99. Add to cart