AR-15 Magazine Interchangeability

[erikpolcrack]

I have read several places that 300 Blackout will work fine in 5.56 NATO magazines. How about 350 Legend?

 

[Doug M.]

No idea, but I know confusing a mag of .300 blackout for 5.56 mags can make for a very violent disassembly of a no longer good AR.

 

[erikpolcrack]

No idea, but I know confusing a mag of .300 blackout for 5.56 mags can make for a very violent disassembly of a no longer good AR.

Thanks. Heard about the Blackout problem. Don't have one. Looking to save some money on feeding my 350 Legend. I'll check to be sure, but I don't think the Legend rounds will chamber in a 5.56.

 

[NewLiberty]

350 Legend requires modifications to standard AR mags to function properly. It's easiet to just buy the correct 350 Legend mags.

 

[Wyo]

300 BLK does not work fine in 30 round 5.56 NATO mags with heavy, subsonic bullets. Ask me how I know. Look around and you'll find lots of others with the same experience. Pmag makes a dedicated 30 round mag for the 30 BLK that works great.

 

[hardluk1]

I have read several places that 300 Blackout will work fine in 5.56 NATO magazines. How about 350 Legend?

Buy mags for a 350 legend and done with the magazine games.

Lots of mags from dura , c-mags and cmmg under 20 dollars out there .