Poorly made striker spring cups! - ZEV Technologies Spring Cups for Glock Slides

I am a huge Zev fan. Their parts for Glocks are some of the best parts on the market.

However, their spring cups are God awful. These have poorly molded plastic that leads to these cups dragging on the firing pin and firing pin spring. It makes the trigger press in any slide with thes cups feel like gravle.

I have done testing and have video proof showing that this small part has a huge impact if it is molded incorrectly. It seems this spring cup is out of spec. The Glock OEM spring cup is much smoother on trigger take up.