The Standard Spring Kit will reduce the trigger pull approximately 2.5 lbs and contains 2 springs. Tactical kit reduces the trigger pull approximately 1.5 lb and contains 3 springs. Tactical kit provides the same hammer and firing pin springs as the Browning Hi-Power kit with the addition of an extra power trigger return spring. Requires fitting by a qualified gunsmith.Notes:Fits Post 1991 Hi-Power Mark III Pistols