Installed the Williams Slugger sight on the TDC. Had problem with one clip not threaded. Williams sent me replacement parts with no hassle. Midway USA also quickly responded and offered to replace the sight. Both good companies. Sight is very rugged but hard to install if you have fat fingers like me. I consider it more permanent and feel if you keep removing and replacing it, you will damage finish and maybe strip screws.
On the firing range, the front sight is just too high for the TDC. I had to put the rear site at the highest point where it is ready to come off the base and I still had to put the base of the front sight in the notch to hit at 50 yds with a slug. I will probably remove the front sight and put in a florescent bead. Not as nice of sight picture but should work. For this reason, the lower profile of the tru glo, allen and hi viz might be better but they are not as well built as the Williams or mount as permanent. Disappointed somewhat as the front sight really looks good on the gun but I don't think I can shoot different ranges with the high sight picture I am getting.