Reduced weight safety selector springs for the Brügger & Thomet APC and GHM Series receivers (APC9, APC45, APC223, APC300, and GHM9, GHM45). This spring set will reduce the safety selector operation weight by approximately 30% with respect to the factory B&T spring set. The APC uses two spring loaded detents on the selector spindle, these springs CAN be mixed/matched, for example installing only one of our springs in combination with one factory spring will reduce the selector operation weight by about 15%.