Mark, the butt trap including lid is lined with felt, the belly trap has a felt liner glued to the underside of the lid plus small springs holding tension on the contents, and the front sight insert is held perfectly immobile by the grip cap lid. I thought at first that I had everything covered but forgot about spring tension on the belly trap contents, had to add that later.
Hey, c'mon now, I already admitted it was overkill, please cut me a little slack.(G) After all, I've trimmed back to only one trap door per rifle now!
Regards, Joe