I just took my SA GI Champion to a local gunsmith for a set of Novak low profile 3 dot sights (not night sights). The sights cost $48 and the work will be about $50. From what he said, some minor grinding/cutting would be needed. Other people I had consulted all said that even if you can get a rear drop in sight to fit correctly and get it banged in on your own, the front sight will need to be machined in. Just looking at that pathetic little hump at the front should tell you a pro needs to do the work.