Possible Clues:

• Cannon part soldier finally found in tree
• Gun barrel's rear
• Back end of a gun barrel
• Soundly split seat
• Part of cannon soldier finally found in tree
• Back part of a rifle
• Drunk beer from Switzerland that will blow your head off if it's loaded
• Bit of gun beginning to rust in wood
• Bottom part of tree contains third of bark
• Opening for loading a gun