Excellent performance, easy installation
It took about 3 files strokes on both sides of the hole and it dropped right into a Springfield Defender (full-size) that had a gritty trigger when new: I also added the Bulletproof Sear (drop-in fit!) to it at the same time. Replacing the factory MIM parts with these changed both the trigger feel (now a crisp, clean break) and much improved the slide's travel over the disconnector: no 'bump' as the slide starts forward from full-back position, silky-smooth pistol now. This helped me shoot smaller groups, too.
