Description
The B&T (Battle Arms Development) BADEMCAMBI Enhanced Ambidextrous Mag Catch is a bolt-in upgrade that adds a second magazine release paddle to the left side of your AR-15 lower, so you can drop a mag without ever breaking your firing grip. It fits any AR-15 style lower receiver that accepts a standard mil-spec magazine catch, and it plays nicely with Battle Arms' own enhanced buttons as well as plain mil-spec release buttons, so you're not locked into a whole matching kit to make it work.
Where this one earns its keep is the two-piece design that runs on its own dedicated pivot pin and spring. Because the ambi paddle isn't leaning on the main magazine catch spring, the press feels lighter and more consistent than a lot of add-on ambi setups, and it doesn't pivot against and chew up the inside wall of your receiver the way some cheaper designs do. The paddle itself is enlarged for a solid, positive feel and offset away from the bolt catch, which keeps you from bumping a mag loose by accident when you're working the controls.
What Sets the BAD-EMC-AMBI Apart
This catch is machined from 8620 heat-treated steel using the same investment cast process as mil-spec parts, then given a tough black finish that shrugs off corrosion and matches the rest of your rifle. The catch body is skeletonized to shave a little weight, and the threaded pin runs shorter to keep the installed button profile low, which is a nice touch if you're running flat-faced or enhanced release buttons.
Installing the Battle Arms Ambi Mag Catch
Installation follows the same basic drill as swapping any AR-15 magazine catch. You remove your old button and catch, seat the new catch, spring, and bar into the receiver channel, then thread the button down while holding tension on the catch. Folks who've run these tend to bounce between multiple rifles once they try one, and it's a common pairing with an ambidextrous bolt catch for a fully both-handed lower. If you shoot lefty or just like keeping your support hand busy, this is one of the cleaner ways to get there.
Key Specifications
- Manufacturer: B&T (Battle Arms Development)
- Manufacturer Part Number: BADEMCAMBI / BAD-EMC-AMBI
- Model: Enhanced Ambidextrous Mag Catch
- UPC: 810033785979
- Platform: AR-15 / M16 / M4
- Material: 8620 heat-treated steel
- Process: Investment cast (same as mil-spec)
- Finish: Black
- Construction: Two-piece design with dedicated pivot pin and spring
- Weight: Approximately 0.35 to 0.4 oz
- Control Type: Ambidextrous magazine release
- Compatibility: Fits any AR-15 lower using a mil-spec magazine catch; works with BAD-EMR, BAD-EMMR, and mil-spec buttons
- Origin: Made in the U.S.A.
What’s Included
- B&T (Battle Arms) BAD-EMC-AMBI enhanced ambidextrous magazine catch
Frequently Asked Questions
Does the BAD-EMC-AMBI fit any AR-15 lower?
Yes, it drops into any AR-15 style lower receiver that uses a standard mil-spec magazine catch. It's also compatible with Battle Arms' BAD-EMR and BAD-EMMR release buttons along with plain mil-spec buttons, so you can mix and match. No receiver modification is needed.
Do I need to reuse my rifle's original magazine catch spring?
The ambi paddle runs on its own dedicated pivot pin and spring rather than borrowing tension from the main catch spring. That's a big part of why the press feels lighter and more consistent than a lot of bolt-on ambi setups. You'll still use a standard catch button and spring for the primary right-side release.
Will this catch mar or wear the inside of my receiver?
No. Unlike some add-on ambi designs, this two-piece system does not pivot against the inner receiver wall, so it won't chew up the finish or the aluminum over time. That's one of the main design goals of the Battle Arms enhanced catch.
Is the BAD-EMC-AMBI good for left-handed shooters?
It's a natural fit for lefties since it puts a release paddle on the left side of the lower where your trigger finger can reach it. Righties benefit too, since you can drop a mag without breaking your firing grip. Many folks pair it with an ambidextrous bolt catch for a fully both-handed rifle.





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