DISCLAIMER: I am not encouraging or advising anyone to modify their firearms. This is for entertainment and educational purposes only. Sear and hammer/trigger job videos: Safety checks: Quick sear spring adjustment: 1911 technical content playlist: 3D animation 1911 Cycle of operation: Old 1911 gunsmith training aid: 00:00 Intro 00:52 Part terminology 02:26 Trigger action terminology 02:58 Sear spring types and dimensions 05:55 How the sear spring functions 07:09 Full trigger action demonstration 10:48 How the left spring tang affects trigger action 11:27 How the middle spring tang affects trigger action 12:19 How sear and hammer engagement affect trigger weight 12:29 How the main spring affects trigger weight 12:42 Friction in trigger system 12:57 Extra special safety disclaimer 13:23 Spring set 13:50 Adjustment demonstration 18:57 Conclusion