OK, here's my story sad but true . Replaced both my sites in my Kimber micro 9 with Tru-Glo sites, Removing sites went well. Replacing front site took awhile to fit but went ok. When I was replacing the rear site there is a spring that goes under the site and I was carefully (I thought!!) keeping it depressed as I slid the rear site on. When I was done, and finished patting myself on the back for a job well done, I discovered that I sheared one curl off the spring . I have ordered a new spring but want to know what would happen if I shot the gun as is while waiting for the new spring?? Thanks for all thoughts.