Ismi Glock 19 13 lb Flat Wire Recoil Spring

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. GLOCKA(R) RECOIL SPRINGS - Flat wire, chrome vanadium alloy,, wound to fit factory diameter guide rod of .250" or less. GLOCKA(R) 17 fits large frame 17,17L,20,21,22,24,31,35. Factory weight is 17 lb. GLOCKA(R) 19 fits 19,23,25,32. Factory weight is 18 lb. Mfg: Ismi SPECS: Chrome silicon or stainless steel round wire, chrome vanadium flat wire.