If properly done a staked on sight will never come off. I have King's target sights staked on three of my Springfields that I installed in the late 80's and shot Major IPSC loads for 10 years. Big, thick, and tall ones. Still as tight as the day I put them on. I have staked sights on many customer's guns and have never had one come off. If you see one come off, the person that installed it needs to go back to school. Please understand I'm not bragging about my work, but the armory method of staking with the proper jig has worked for many years. I appreciate a nicely dovetailed front sight on a 1911 ,but I think it only makes it easier to change out sights rather than being a "better way" to do it.