As the title says. My group got em in a lump deal and none of us have GBB M4s, so we’ve just been sitting on em for awhile. I’m fairly certain they’re G&P PTS 39rd Magazines. They go for 50$ brand new on Evike. I’ve no reason to believe there’s anything wrong with them, all the parts are there externally, they don’t leak and the guy we got em from said they worked fine but I have no way of testing them so I can only say I’m 99% certain they work. Price is shipped and feed. Will consider tr.ades for GBB AKM magazines or PKM rail attachments if you’re local (within 100mi).