JBM - Personal - HK USP Trigger Smoothing - 10

Detent Plate

I smoothed the inside of the detent plate which helped the feel of the control lever. Just roll a small piece of sandpaper and use it like a file. It takes a while, but it does help.

I use a punch to hold align the detent plate in and push sear axle in the rest of the way from the far side:

It may be necessary to rotate the control lever slightly to insert the detent plate.