This is one of the smoothest operating triggers we have ever seen or built. Simple to install, remove, and 100% American made.
Made out of 100% STAINLESS STEEL unlike the other vex shoes which are made out of aluminum. The weight of the shoe with the safety blade is three times heavier than the aluminum shoe weighing in over 14 grams.
Stainless steel is also more durable than aluminum and this trigger shoe will outlast all of us. 
Limited supply. 
Trigger shoe fits ALL models and generations of Glock including the smaller 42, 43, and 43X.