Firepower Inc Drum Mag ?

[tmedic]

A friend of mine has a 100 ? round drum magazine made by Firepower Inc of Hancock, Maine. Neither one of us knows anything about these mags. Not much on the web about them at all. Would like to know how to load and repair them. We don't even know if this thing works. Any info would be great.
It is a round metal drum with a clear plastic cover on one side. Out of the top center is what looks like a 5 round regular Ar mag.

[ovlov28]

Might try to get a hand full of dummy rounds, and load them, and cycle them through with the charge handle. Just to see if it needs repair, or if it feeds and is worth more effort.

Have you tried loading it like a standard AR mag?

[tmedic]

It will load about 10 rounds traditionally and cycle half of them. I found out a little about these which mostly was negative reviews. Still I would like to try and get it working.