Rear sight set screw size?

I have the basic carry cut Dagger and would like to swap out the stock basic sights for night sights and do not have an allen wrench to fit the set screw on the rear iron sight. I have nice allen wrench packs but neither metric or standard packs contain the the correct size. Can anyone give me an exact size I need. I have seen it mentioned in a few other threads that they don’t know the size that it was in between sizes. Is there some other measurement besides metric or standard that I’ve never heard of before. Someone else mentioned beating a torx bit into the screw to remove it. I’d rather not try this as my past hammer skills may result in personal injury or a marred slide…LOL

I have the same question. I also cannot find a correct hex wrench to fit. I was wondering if it got rounded out during installation?

Mine takes a 1/16 allen.

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