I was shooting the Maadi ARM I recently purchased when the upper handguard popped off. The upper handguard is an Ironwood Designs standard AKM length upper. I put a retainer clip/spring on it when I got home, but it still came off with no effort. Upon taking a closer look, I noticed that the space where the upper handguard is installed is longer than the upper handguard itself. The rifle did not come with an upper handguard installed. The gas tube is numbered and its paint scheme matches the rest of the rifle, but the three digit number does not match that of the receiver. Am I correct in assuming that I'll need a standard AKM gas tube to replace it? If anyone has a Maadi gas tube please PM me.