So I got my hands on this. The main question I have is what is it compatible with? I found multiple versions and tried some research can’t figure it out. Maybe looking in the wrong places. Anyone got any ideas?

Posted by Beneficial-Cut-8196@reddit | Firearms | View on Reddit | 18 comments

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JGr2-J5_Mueller@reddit

That is a Beta-C double drum 100rd mag, as seen stamped on the front it is for 9mm, made to feed AR style pistol caliber carbines.

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Verthias@reddit

Colt style magazine 9mm AR-15s most likely.

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Beneficial-Cut-8196@reddit (OP)

I was looking at the and the hk mp5 it just doesn’t look the same to me but maybe it’s just me

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Verthias@reddit

There is a MP5 drum kit, this one from the one picture looks like it's for the colt. I heard they had interchangeable feed towers, but these are kinda rare nowadays.

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Beneficial-Cut-8196@reddit (OP)

Think I could interchange it for a Glock mag?

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EUGsk8rBoi42p@reddit

You can get a Colt magwell insert for an AR to make this work, just need the 9mm barrel and bolt after that.

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Logizyme@reddit

Definitely the Colt AR9. I've got one that runs great.

There are also glock, UZI, and MP5 versions.

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fuddadjacent@reddit

There’s one that’s been sitting in a local shop near me for ages. What are they worth?

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Logizyme@reddit

Beta-C were pretty expensive. MSRP was about 350 for most models. Made in the USA

5.56 models were the most popular, and 9mm versions just did not sell in the same volume, so I guess they'd be a bit rare.

Chy-na started cloning the 5.56 models and selling them for $100 and it put Beta-C out of business.

You could check completed auctions on GB if you want an accurate value or just pay what the shop is asking because they are cool and rare and you'll never be mad you have a drum if the mag bans come.

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Uptight_Internet_Man@reddit

The Patriot after you defeat The Boss.

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These where temperamental on the best day. You had to keep them well lubed with graphite. Even then they tended to jam on full auto. Rapid fire was hit or miss. Military banned them because of these issues.

Surefire coffin mags work much better.

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hitemlow@reddit

What about the Schmeisser S60?

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Quw10@reddit

They work but can also be finicky. I think it's the older ones that don't like steel cased ammo and the newer ones have a break in period in my experience but for what they go for on sale I'm not disappointed.

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SplashingChicken@reddit

Uzi takes these. I love Tarkov.

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TheBullpupGuy@reddit

So Beta company has shut down. A side profile of the mag adapter will let us know which model it is.

The genious of the designnof these mags is that the 556, 308 and 9mm all have the same drum. The only part that changes is the magazine adapter and the followers (string of bullets) which can be swapped out for different platforms.

For instance, my G36 C mags only work in my G36, but by swapping the middle body part I can make it work on an HK93/33 or a Stanag platform, or a Sig 550, etc.

While the company was in buisness the magazine body conversion kits were like $70. Which makes this "expensive" mag a much nicer piece of equipment when it can be cheaply kodified to work with multiple guns.