Featuring a hardened polymer body with a durable steel spring and polymer follower, the GSG 16 .22 LR 110-Round Rotary Drum Magazine is an ultrareliable MP5-style rimfire magazine, engineered to deliver smooth, jam-free operation and consistent field performance in virtually any environment. The built-in side button serves as a built-in speed loader for faster, more comfortable reloading. Better yet, the loading lever channel serves as a witness window for quick, visual round counts, and features a button cutout that allows you to lock the side button at the bottom for faster loading.