I had a new one of these about 25 years ago and it wouldn't shoot then, they use 8 gram co2 , they are a waste of space ,you have more chance of finding a full one that don't work than spares.sorry,the in line mag never worked properly , the Drulov uses a similar system and that is very unpredictable,
can fire 2 at once or none , loading gas was also a pain in the cap.
Benjimen made this to compete with the Crosman 600 , no match.
atb Dave.