If you draw your pistol with your right hand, choose “Right”. If you draw with your left hand, choose “Left”.

Video | What’s Included | Specs | Pictures | FAQ | Related Info

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 new 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.


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One T.REX Sidecar Pistol Mag Attachment with one T.REX IWB Tuckable Clip installed.

Note: Does NOT come with a pistol magazine.

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Made from 0.093 precision-formed Kydex. Has five retention adjustment screws. View the Sidecar Hardware Diagram HERE.

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.

This is NOT a standalone product. It is designed to be attached to the new Sidecar holster.

Made in the USA by T.REX ARMS.

The T.REX IWB Tuckable Clip is injection molded from high-strength acetal plastic. It is 3/4″ wide and 3 5/8″ long and is a Universal fit (i.e. fits belts 1.5″ to 1.75″) with a 0.5″ of adjustment. Made in the USA.

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Could I attach this to a Sidecar without the friction washer?
The question isn’t really could you, but should you. While the Spine pin is very secure even without the friction washer, it’s wise to build in redundancy. If you need replacement hardware, you can find it here.

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Sidecar Pistol Mag Attachment Overview – Video – T.REX ARMS

The New Sidecar Holster Overview – Video – T.REX ARMS

The Open Source Sidecar Spine System – T.REX ARMS

The Open Source Sidecar Spine System – Video – T.REX ARMS

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