Apex tactical flat advanced trigger - Apex Tactical Specialties Flat Advanced Trigger for Sig P320

Installation was simple and if confused there are Youtube videos that can show you step by step, Once installed it transformed the trigger action to one even smoother than provided by factory trigger with a solid, crisp and consistent trigger pull. I most highly recommend this flat trigger upgrade from Apex, all necessary parts are provided, new flat trigger, trigger bar and over travel stop and spring which takes up some of the slack in trigger giving it a crisper trigger pull. You'll need some simple tools: small punch, tweezers, and maybe small nylon tip hammer to assist punch in pin pushing.