CAD designed and built to aerospace specifications from chrome silicon, corrosion resistant, stainless steel or chrome vanadium for maximum durability, consistency and reliable performance. Built to aerospace specifications; heat treated, shot peened and fully stress relieved to minimize spring set. BERETTA RECOIL SPRING - Chrome silicon (CS) springs wound for 14 and 16 lb. Beretta Models 92 & 96. SPECS: Chrome silicon or stainless steel round wire, chrome vanadium flat wire.