The Glock 42 is the smallest Glock, a slim .380 ACP pocket pistol. It shares its sight cuts with the other Slimline models, the 43, 43X and 48, so Slimline sights fit it too.
Low sights
Angry Bear makes low profile Slimline sights in two versions. The fiber optic set gathers daylight into a bright front point that is quick to see. The blank set is plain black, with nothing to distract the eye. Low sights snag less when the gun is drawn from a pocket or a tight holster.
Tritium co-witness
Night Fision's tritium set is the tall co-witness type and glows in the dark. On the 42, which has no optics cut, it is simply a night sight with a slightly higher picture.
Spare screws
Angry Bear also sells a pair of spare front sight screws for its Glock sights, useful if one is lost during fitting.
All Slimline sights that fit the 42 are in Sights for Glock 42.
Frequently asked questions
Do 43 sights fit the 42?
The Slimline sights here list the 42, 43, 43X and 48.
Do I need a special tool?
A Glock front sight screwdriver makes the front easier to fit.