The advantage of paint is that it is not permanent and the front sight blade may be easily restored. Future generations of collectors will appreciate that.
The advantage of an insert is that it is more durable. Of course, this entails cutting a dovetail into the front sight and sticking in a piece of plastic. The front sight is forever altered and it costs more to do.
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Vigilantibus et non dormientibus jura subveniunt. Molon Labe!
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