Using Gsub in R to remove wildcard within brackets

Question

I have some data that looks like this:

n <- ("String [a]", "String2 [b]")

I'd like to remove the brackets and everything within them so I get this:

n <- ("String", "String2")

The code I have is:

gsub("\\[*]", "", n)

Which doesn't work because the \ mean R interprets the wildcard * literally. How do I fix this? Thanks!