I have a question for 11-87 owners, or guys that know their guns, because I apparently don't. I recently purchased an 11-87. After taking it out to shoot some trap, I cleaned the gun. Now, if the action is open, and I point the gun up in the air, then down at the ground, I can hear a peice sliding on the magazine tube.It's the little circular piece that I have a big red arrow going to in the picture. Why is it doing this now and it wasn't before? I asked a gunsmith in a gunstore nearby and he said that it's supposed to be doing that, but their floor model 1187's weren't doing that. I'm confused and just want to make sure somethings' not wrong with the gun. Thanks for your help in advance.