I've heard that the plastic mags can't be opened/disassembled and cleaned like the metal mags. Is that true or only for certain brands?
Not being able to clean a mag would be a deal breaker for me. Plastic just doesn't seem right for a mag. They can take a lot of abuse getting knocked around and driven into the ground.
Pmags are easily taken apart and put back together. just simply push the button on the bottom and slide the plate off and pull out the spring and follower.. then just slide the plate back on after you put everything back and you're good to go