Replacement sight blades are available. You might want to get a taller one to make it easier for shooting under 300 yards. Here is one source: https://www.libertytreecollectors.co...?idCategory=42

The other option is to peen the bottom of the sight:


This doesn't leave any visible marks and only the sight blade is altered. I have found that it often takes a couple of peen points to get them tight enough.