T.REX Sidecar Pistol Mag Attachment
- $5
- $5
- $5
- $5
- $5
- $5
- $5
- $5
- $7
- $12
- $12
- $5
- $5
- $12
- $5
Holster Attachments 6


Overview
This pistol mag carrier allows you to carry a spare magazine in the appendix position—just like the original Sidecar Appendix Rig—but with the added benefit of flex down the middle and adjustable mag ride height. It attaches to the Sidecar holster via the Spine System with a pin and friction washer.
This mag carrier offers more adjustable retention points than the original Sidecar as well, five to be exact, and they can be tweaked to give you the perfect fit on your magazine. Watch the product overview video for installation and adjustment instructions.
What's Included
- 1x T.REX Sidecar Pistol Mag Attachment
- T.REX IWB Tuckable Clip (installed)
Specs
- Made from 0.093 precision-formed Kydex
- IWB Tuckable Clips are available in high-strength acetal plastic or heat-treated C1050 spring steel with a durable powder-coat finish.
- Fits belts up to 1.75″
- Has five retention adjustment screws
- The attachment and Spine are formed from a single piece of Kydex for a smooth and flexible design. The attachment is connected to the holster by a machined steel pin, which lends the Spine strength and creates the ability to quickly and easily swap out attachments. Can be mounted to the Sidecar at your desired height.
Made in the USA by T.REX ARMS
Manuals/Documents
FAQ
Could I attach this to a Sidecar without the friction washer?
60 Day Free Returns
Return or exchange the product anytime within 60 days of receipt. Available for domestic orders only. Please use the product as you normally would and if you run into any issues and want to return or exchange it, we will provide a pre-paid label to ship it back.
Learn more → T.REX Lifetime Warranty
Backed for life. If your product ever breaks due to normal use, we will fix or replace it.
Learn more →