Features: Patent-pending retention fingers keep your shells secure (even upside-down) and flex to release a shell when you need one Made of high-impact Geon PVC - UV-resistant, oil-resistant, flame-resistant to withstand virtually anything you throw at it Ambidextrous design allows for right or left-handed operation Large thumb sweep area accommodates gloved operation Durable spring made of the same material used in USGI rifle magazines Removable base plate with drain slot allows easy access to spring and follower for cleaning and maintenance Exclusive, adjustable mounting system features two sets of dual mounting clips (1 long, 1 short) and can be used together or independently The clips are removable and can be adjusted into over a dozen configurations to mount almost anywhere