The SINCLAIR CHAMBER PLUG is designed to seal the chamber and bore to prevent solvents and oils from contaminating the action when a rifle is stored upright.
For cleaning heavily fouled barrels, the plug can be used to seal the chamber while the barrel is filled with solvent, and if left overnight, the muzzle should be taped to avoid evaporation.
When storing firearms for extended periods, the chamber plug can prevent rust preventative agents and oils from seeping into the action and trigger group, protecting against trigger damage due to oil and debris.