Our take: The NEW Thompson 380-round High Capacity magazine is a perfect spare for the for Thompson-style AEGs. This magazine minimizes reloading while in the middle of a game, allowing you to focus more on taking down targets. This magazine will fit CYMA and King Arms Thompson-style AEGs, with compatibility on some Cybergun models. If you're looking for a hi-cap magazine with a nice finish, then this is the perfect one for you!