Description
Standard AR-15 controls were built with right-handed operation in mind, and the magazine release is one of the biggest offenders. The CMMG Zeroed Ambidextrous Mag Catch fixes that by adding a support-side release bar so you can drop a mag without breaking your firing grip or shuffling your hands around. It replaces your existing mag catch and gives you the ambidextrous control that CMMG's original ambi catches are known for, with an extended-release bar that adds real leverage when you press it.
That leverage matters more than it sounds. A longer bar means less finger travel and a more natural motion during reloads, which is exactly what you want on a training rifle, a duty gun, or any build you run hard. It works with both mil-spec style and aftermarket mag release buttons, so you can keep your current right-side button or pair it with something extended without hunting for compatibility. Feedback from AR-10 owners is worth noting too, since several have reported it drops right in on PSA AR-10 lowers and plays nicely with standard Magpul magazines.
What Sets the Zeroed Ambi Mag Catch Apart
This is a drop-in part, meaning no filing, no receiver modification, and no gunsmith needed for most standard lowers. Install typically runs a couple of minutes. The kit ships with a mag catch spring so you have what you need to swap it in, and CMMG backs it with their Lifetime Quality Guarantee. Worth mentioning: some thick billet lowers can be tight around the mag catch, and CMMG has a reputation for fitting where pricier ambi catches sometimes won't.
Getting the Most From Your CMMG Ambi Catch
If you find the mag isn't seating or dropping quite right after install, a small adjustment to the catch screw tension usually dials it in. It's a common tweak on any ambi setup and takes seconds. For folks who want maximum ambidextrous capability, CMMG also offers this catch bundled with their Zeroed extended button, but on its own this catch is a straightforward, wallet-friendly way to make your AR work for both hands.
Key Specifications
- Manufacturer: CMMG
- Manufacturer Part Number: 55AFE96
- UPC: 810046235867
- Model: Zeroed
- Type: Extended Ambidextrous Magazine Catch
- Platform: AR-15 (works on many AR-10 lowers)
- Hand Orientation: Ambidextrous
- Material: Steel
- Finish: Black
- Button Compatibility: Mil-spec and aftermarket mag release buttons
- Installation: Drop-in, no receiver modification
- Weight: 0.10 lbs
- Warranty: CMMG Lifetime Quality Guarantee
What’s Included
- Zeroed extended ambidextrous magazine catch
- Magazine catch spring
Frequently Asked Questions
Do I need to modify my lower to install the Zeroed ambi mag catch?
No, it's a drop-in part that replaces your standard magazine catch with no filing or receiver modification on most standard lowers. Install usually takes a couple of minutes. A few very thick billet lowers can run tight around the mag catch area, but CMMG parts have a good track record of fitting where some others won't.
Will this ambidextrous mag catch work with my existing mag release button?
Yes. It's designed to work with both mil-spec style and aftermarket mag release buttons, so you can keep your current right-side button. If you want a matched extended setup, CMMG offers this catch paired with their Zeroed extended button as a kit.
Does the CMMG Zeroed ambi catch fit AR-10 rifles?
It's built for the AR-15 platform, but multiple AR-10 owners have reported it drops right in on lowers like the PSA AR-10 with no filing or modification. It also functions with standard Magpul magazines in those setups. As with any cross-platform install, confirm fit against your specific lower.
My magazine isn't seating or dropping right after install. What can I do?
That's usually a tension issue and an easy fix. Slightly adjust the mag catch screw, tightening or loosening it, to fine-tune how firmly the catch holds the magazine. This is a common tweak on any ambidextrous mag catch and only takes a few seconds.





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