© 2023 RJK Ventures LLC. All Rights Reserved. Tthe RJK Ventures logo. Mag|Coupler, magcoupler, CA Drum, California drum and the Mag|Coupler logo, are trademarks of RJK Ventures LLC, in the United States and/or in other countries. Other brands, products, or service names mentioned are or may be trademarks or service marks of their respective owners.  Notice: This content is for informational purposes only and does not set forth any warranty, expressed or implied, concerning any equipment, equipment feature, or service offered or to be offered by RJK Ventures LLC. RJK Ventures LLC reserves the right to make changes to this document at any time, without notice, and assumes no responsibility for its use. This informational document describes features that may not be currently available. Contact a sales office for information on availability. RJK Ventures LLC is neither a firearms dealer nor buys-sells firearms.


"Great idea, good quality polymer and texture easy to install and disassemble.

Highly recommended" - James, NJ

Exclusive: Full MSR Firepower: Check Out The Mag|Coupler

For Modern Sporting Rifles, This Accessory May Be The Smartest Investment

By Dave Workman

People who own semi-automatic modern sporting rifles (MSRs) built on the AR or AK platform are always looking for some new accessory to trick out their guns, whether it’s a different sight, laser or flashlight — something to set it apart from the herd.

I’ve always been intrigued by the simple things, because in my experience simple is best and least likely to let you down at the worst moment. Sometime back, I reviewed a little snap-on tab that fits on the dust cover of an AR-type rifle to protect the receiver finish, and now comes another little gadget so simple it makes my subconscious scream, “Why didn’t you think of that?”

Enter the Mag Coupler from RJK Ventures LLC, a little outfit headquartered in Aliso Viejo, Calif. Trust me on this, the Mag Coupler is a product that literally lives up to its name, because it does exactly what it’s designed to do.

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Watch the mag change using our MAG|Coupler at 0:18