My gun is that way and as long as it shoots, I don't really care. I also don't take it apart to clean it because it isn't really necessary (IMHO). I just spray it out (flood it basically) with GT85, let it dry then put the gun up. Mossberg, if I remember correctly, recommends cleaning it with something that evaps. mostly. GT85 does that and leaves PTFE (teflon) behind. It's a pump shotgun. Pretty hard to destroy it me thinks.