Front sight clarification...

[amadeus76]

I'm asking about the blades...

I have an opportunity to buy a set of Fazakerly stamped front sights with split bases. I don't particularly need the sights for two of my current rifles, but the third will probably need a new and correct sight in the future. Beyond that I thought it would be good to have a full set on hand for any rifle I acquire in the future. However, before I buy the set I want to be sure that they can be used across the different makes or it's pointless.