APS Smart CO2 Charger for Standard Cylinder

The charger itself is strong and has a long snout, so it is good to inject gas into the shell.
However, there are problems with quality control such as rotting O-ring, which requires improvement.

The O-ring inside was rotten, so it was not charged at all and all leaked.
So I opened the puffdino white gas can and repaired the charger using the internal O-ring.