The SINCLAIR CHAMBER PLUG is designed to seal the chamber and bore to prevent solvents and oils from seeping into the action when the rifle is stored upright.
For cleaning heavily fouled barrels, the plug can be used to contain solvent within the barrel, and if used overnight, the muzzle should be taped to avoid evaporation.
These chamber plugs are useful for long-term storage to prevent rust preventative agents and oils from moving into the action and trigger group, protecting against trigger damage caused by oil and debris.