Possible Clues:

• Gun in a Western
• Revolver variety
• Arm that's hairy and small, short 3
• Revolver shown in photograph held by Cub pack leader
• Weapon team brought back in ship with siren
• Revolver
• The revolver finishes with the horn
• The arm produces awkward delivery after big hit
• OK Corral weapon
• Dart kept by scout leader as a weapon