From Overwatch Precision's website*
"Overwatch Precision is pleased to introduce the first aftermarket polymer trigger for Glock pistols! This trigger is designed to provide the same great feel that our aluminum triggers provide at a reduced cost for the budget minded shooter. As always, the flat-faced polymer DAT trigger will provide increased leverage to the shooter as well as a reduction of pre-travel by as much as 20% (depending on frame tolerances) without compromising firearm safety features, resulting in a clean, crisp break and reduced overtravel.
The shoe and safety are solid body polymer attached to a polished OEM Glock trigger bar. The Overwatch Precision Poly DAT is completely drop in ready and is in stock for all Gen 1-4 Glock pistols."
This trigger will not work in the G19X or Gen 5 Glocks."
Available for Gen 1-4 Small Frame, Gen 1-4 Large Frame, G42, and G43/43X/48