Run & Gun fits today's most popular lights. The ring is permanently attached to the unit on one side and the other side has two quick-release knobs for assembly in less than 10 seconds. Run & Gun is constructed of a double layered heat shield fabric on the front panel that works as a pocket to hold gels. The outside perimeter has hook and loop tape around 3 sides to attach diffusion fabrics. Run & Gun allows the use of both gels and diffusion fabrics in tandem. Comes standard with a full stop diffusion fabric. Each unit includes a heavy-duty, collapsible carry case. Accessory kits consist of four gels and two diffusion fabrics.