4BROS RaceCar Appendix Rig Collection
A collection page of Four Brothers
About
Designed for Comfortable Appendix Carry Built for appendix carry without fighting your body. The 4BROS RaceCar Appendix Rig combines our precision-molded IWB holster and magazine carrier with a flexible, injection-molded adapter plate designed to articulate with your body's natural contours and movement. That flexibility allows the rig to move and conform more naturally against the body, helping reduce common pressure points while improving comfort and concealment during everyday carry. The connected design keeps your firearm and spare magazine together in one streamlined appendix carry setup—designed to move with you, not against you. Built on the Same 4BROS IWB Foundation Each RaceCar Appendix Rig uses our proven IWB holster design, precision formed from durable .093" Kydex thermoplastic for a secure, consistent fit. Adjustable retention lets you fine-tune your draw, while the optics-ready profile is cut to clear most popular red dot sights. Paired with a matching IWB magazine carrier and the flexible RaceCar adapter plate, the result is a complete appendix carry system built around comfort, concealment, and adjustability —available for a growing selection of firearm and weapon-light configurations.