First of all, the Sig Sauer P320 is a striker-fired, semi-automatic pistol. Without getting into the weeds, a striker-fired pistol is designed to offer the same exact trigger pull for every shot, first to last. Inside, the striker (the firing pin, more or less) is always partially tensioned. The trigger press cocks it the rest of the way, then releases it. It’s this partially cocked process that allows the trigger press to be moderate in weight. On the pistol I tested, the trigger broke at 6 ½ pounds. Subjectively speaking, I would say that it feels lighter than that, probably owing to the smoothness of operation and the large, smooth trigger face.