Apex Tactical Specialties Forward Set Trigger Bar Kit, Fits Sig P320 112-041 The Apex Forward Set Trigger Bar for the factory upgraded models of the Sig Sauer P320 is a direct replacement to the factory trigger bar and is easily installed. The patent pending Apex Forward Set Trigger Bar reduces trigger travel and reset and can be paired with the factory curved trigger or one of the three Apex triggers for the P320.