Wife was shooting her S&W 63 .22lr and a problem developed with the "2 inch long bridge" that holds the sight. Sorry for not knowing the technical name for it. But it's that black plate that has a screw above the barrel and another closer to the sight blade (I hope I explained it OK). Looks like a mini-surfboard. No matter how often I tightened it the plate would become loose the the sight would wobble all over the place. Is this a loctite fix or something that needs to be sent back?