One of the best set of Glock 42 night sights you can buy is the Glock 42 big dot tritium sights from XS sight systems.
The over sized big dot that glows makes acquiring your target faster and easier than any other sights on the market.
The G42 big dot night sights are meant for fast targeting, not competition precise target practice...real world target acquiring where milliseconds count and you need to get on target fast.
These are perfect for carry guns like the sweet shooting Glock 42.
You will not be disappointed with these sights.
XS also makes the same type of sights with a smaller more standard dot here.
Update February, 2014 - One customer let us know that installing these Glock 42 sights was extremely easy and just took him a few minutes.
**(Rear dot/line is high visibility white paint)