Overall great..But...
I waited for these to be released for months. Once avalable, I ordered 3 for each of my PX4s. 2 apparently went in like a charm. 1 wasn't right and broke while installing due to the trigger not fitting. The 2 installed work great. But the one I am waiting to have replaced. However, it seems I'm not getting the support LTT normally gives. Pretty sad. But Im not sure if it's from LTT or Grayguns giving the issue. I only hope it gets sorted out since I've been a loyal LTT client and supporter.