TM MP5 Magazine Help!
 

Before I start, I know this isn't a gun i should use on the field and isnt considered "Airsoft", regardless its a TM Springer in country and working,

I was wondering if anyone had this before and knows how to work the mags it seems like a hi cap...but its not? I see 3 compartments and I know I have to hit that button on the bottom to release the spring but the BBs arent feeding.

any help would be appreciated, thanks a million.