I did mine on my RIA 1911, its very easily done. Here a link to another thread talking about changing the sights
http://www.msgunowners.com/t11720-changing-out-sights-on-a-gi-model-1911?highlight=1911+sights
http://www.msgunowners.com/t11720-changing-out-sights-on-a-gi-model-1911?highlight=1911+sights