The T.REX ARMS Sidecar Holster is the industry-standard solution for effective and comfortable appendix inside-the-waistband concealed carry. Our modular attachments allow you to carry things like an extra pistol mag or tourniquet alongside your firearm. The T.REX Spine System allows you to easily swap out attachments and flexes as you move to conform better to your body. This provides increased comfort and concealability, while also retaining the stability you need for maximum consistency when you draw your pistol or grab your magazine for a reload.

If you want to run your holster without an attachment (in the appendix or 3-5 o’clock position), each holster comes with our Sidecar Wing, which has a stabilizing belt clip and mounting holes that can be used to attach knife sheaths or other tool holders so you can easily assemble your own attachments. This is the most adaptable holster system on the market, and more attachments are in development.