Long Chinese Matchlock Musket
 

A friend asked help in translating the long inscription. Other friends have done it except for two characters they can’t read, maybe due to poor images? Friend is trying to get better images or rubbings. Here’s partial info for now.
Characters he can’t yet translate, can you?

Sorry Cannonmn, but you kow the rules; pictures from host links are ephemeral and not allowed. Please save them to your computer and upload them using forum atachment features. Hopefully pictures also include the entire gun.