Any tips or mods to increase the accuracy of Benjamin Wildfire?

 When I used to have one I noticed if I grabbed it and shook it I could hear the barrel rattling inside the liner. So I put some heavy grease around the barrel and it stopped it from doing that. It’s something that I found out by accident. I was going to order the super sear But it started to leak and I sent it back. The worst thing was the trigger.All I did was Google how to improve a Benjamin wildfire trigger and it came up.