JBM - Personal - HK USP Trigger Smoothing - 5

Reinstall Trigger

Getting the trigger back in the frame can be a pain because the trigger return spring takes a good bit of force to insert and it is hard to reach. The best way I have found is to insert the trigger and push it forward. Insert the trigger axle just enough to hold one side of the trigger in and then with the needlenose pliers insert the spring (you may need to twist along the long axis of the frame) and push the pin in. If the pin doesn't line up, push on the trigger to line of holes in the far side and push the pin in.