ar 15 pistols,CMMG,57A1843-CKS,5.7x28mm View cart “CMMG Banshee 300 Mk57 5.7x28mm, 5″ Barrel, Slate Cerakote, Black RipBrace, 20rd” 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 STOCKCMMG Banshee 300 Mk57 5.7x28mm, 5″ Barrel, Slate Cerakote, Black RipBrace, 20rd $2,218.18 Original price was: $2,218.18.$1,996.36Current price is: $1,996.36. Add to cart