The Victory Arms Recoil Spring Assembly represents the ultimate in recoil spring system technology and design. Manufactured entirely from the highest quality stainless steel alloys, our system will abosrb recoil forces better than any other system on the market today. As the only recoil spring system available with stainless steel springs, our system will not only outlast any previous or current assembly, but it will also return you to battery faster and more reliably than anything else on the market. This is a direct drop in replacement for not only the Victory Arms Defense series, but also is the perfect replacement for that worn out recoil spring assembly in your Seattle manufactured 3 1/2 inch cone barrel .45.