I discovered that the owners manual was not very clear on maintenance. After following the directions to completely break it down it was filthy. See owners manual recommendations below:
Before beginning any operation whatsoever on your carbine,
always make sure that chamber and magazine have been completely
(Carefully read loading and unloading instructions).
Thanks to its extremely simple design and accurately chosen materials,
the ARGO carbines do not require special maintenance.
We nevertheless recommend the following:
1) routine cleaning of the barrel after use;
2) periodically clean and lubricate the firing mechanism (hammer,
trigger and magazine) to avoid clogging with powder residuals
(or other foreign matter);