I went out yesterday with the wife to shoot at the range. She always grabs the Wolverine R .177 to shoot as it is her favorite (I shoot it a lot also) I've had the gun since last November (bought form AoA). So today I put it on the bench to clean and go over and I have a strange noise when I tilt the gun forward and back. It sounds like it is like a few pebbles in the air cylinder, but they don't travel the full length - just a short bit where the tank attaches to the gun. I haven't taken it apart yet to see what's up - it's one of those guns that I really leave alone because it shoots so well with the factory setup. Anyone else have something similar? It's almost like a couple small screws or washers sliding around for about an inch. The sound is definitely in the bottle end where the wood meets the bottle. I don't think I want to shoot it until I figure out what's up. Anyone with something similar any help will be greatly appreciated.