Yep. About 20 minutes and a lot of scratches on the floorplate finish. It's the extended mag. The metal floorplate is supposed to drop into the plastic extension once reassembled, but is has some nasty guides that have to fit into slots in the extension. They don't want to go in, so the floorplate rocks at an angle. If you don't understand, just try it. NO JUST KIDDING DON'T DISASSEMBLE THE MAG!