Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
AR Sponsor
8/6/2026 7:58:29 PM EDT
I am planning on buying a few magazines. I'll need a few 5 round magazines. I might get some 20's too. Will 300 Blackout magazines work for 350 Legend? I have some of those already. What do you guys recommend?
Don't mess with the ants. They're well armed, they shoot straight, and there's more of them than you can imagine.
8/7/2026 11:40:17 AM EDT
[Last Edit: VASCAR2][Edited] [#1]
C Products Defense Duramag makes five, ten and twenty round 350 Legends magazines.   I don’t have a 350 Legend AR-15 but the alignment grooves will be different on 350 Legend compared to most other AR-15 magazines.   The 350 Legend with a straight wall case might work for one or two rounds in a 5.56/300 BO mag but I suspect there would be issues trying to load to capacity in a 5.56/300 mag.



https://gunmagwarehouse.com/catalogsearch/result/?q=duramag%20350%20Legend

8/7/2026 12:16:25 PM EDT
[Last Edit: MallNinja531][Edited] [#2]
I don't have a ton of rounds through it, but Ive been happy with the wilson combat modified lancers.

https://wilsoncombat.com/magazine-ar-15-350-legend-15-round-polymer-lancer.html
8/7/2026 1:55:47 PM EDT
[#3]
LGS stocks Duramags.  I have a 5 and a 20rd mag.
8/7/2026 6:46:43 PM EDT
[#4]
I have a wilson combat lancer. It has been great.
8/11/2026 1:55:35 AM EDT
[#5]
Wilson mags do not work in 4 different 350 guns I have had. Only mags that work 100% are Duramags. They make them for cmmg and ruger so buy the cheapest as they are the same. Wilson doesn't do a thing to the mags. They are just a 300blk mag.
8/11/2026 11:12:10 PM EDT
[#6]
Second that.  I bought the CMMG mags back when I built my 350 a few years ago.  They've been 100%, even when loaded to max capacity.  Wasn't aware at the time they are made by Duramag, so be it, they work.

Sign up to continue the discussion

Create a free account to share your thoughts, follow topics, and connect with the AR15.COM community.

Already a member? Sign In

AR Sponsor