That's all the disassembly needed for cleaning. No tricks or tips needed. A green O-ring serves much the same function as a barrel bushing by helping to stabilize the barrel when the slide is in battery. The USP Expert is truly a fun gun to shoot. Even after 700 rounds, there were no stoppages of any kind.
Function is excellent with ball, hollowpoint and even wadcutter loads.
The velocities however, are just a bit higher than we're used to. Most likely this is due to the polygonal rifling. But the difference in velocity isn't enough to brag about, and is worth mentioning only because it's a little different from what we normally get. Accuracy is good too. It is ready to plink with real style and is capable of truly terrorizing soda cans from far, far away.