Drop-in kit with newly designed self-cleaning trigger connector helps eliminate bothersome pre-travel and allows fast reset for improved accuracy and quick shot recovery. Trigger connector features a self-cleaning debris channel that reduces accumulation of grit and residue for less friction, longer service life, and improved reliability; connector may require minor fitting. Installation requires no permanent alteration to pistol. Not for use for self defense with 4 lb. firing pin spring or 2 lb. firing pin safety spring. For self defense use with 10mm/.45 caliber Glock, a Wolff 6 lb. firing pin spring and factory Glock firing pin safety spring are recommended. Will Not Fit Mfg: Ghost SPECS: Trigger Connector – Stainless steel, polished finish. Springs – Tempered steel. Includes 2 lb. firing pin safety spring, 4 lb. firing pin spring, 6 lb. trigger spring, armorer’s orange slide cover plate, and armorer’s tool.