CYMA - M4/M16 150rnd Mid Cap Magazine - Black is an Airsoft Magazine designed to fit STANAG accepting M4/15/16 Magazine Accepting Weapons, such as M4, M16, L85, and more. The magazine is constructed with an Alloy shell with Polymer internals, and can hold up to 150 BBs. The Magazine is loaded from the top using an Airsoft Speed loader, and the BBs are fed using a compressed spring. Due to the design of the magazine there is no rattle, unlike hi-cap magazines, making them great for stealthy players or those who don't like to carry tactical maracas. These types of Magazine are typically used for their enhanced realism and ease of loading, with a lower round capacity you will find yourself having to reload more for a more realistic experience. These types of Magazine are great for those who are going for a more realistic feel to Airsoft, or for those who are going to visit a Mil-Sim event where only Mid-Cap Magazines can be used.