What are the best AR mags for 300 blackout

[edzz]

What length gas system?

 

[Calvino]

What length gas system?

Pistol

 

[Eustace28]

So far 125 and 150 grain ran very nice I started having the issue with the 220 grain
All ammo is AAC so far

I've found the supersonic rounds run fine out of 223/556 mags. It's the subsonic 220 gr rounds that seem to benefit most from the 300 blk specific mags.

 

[Calvino]

Iam having feeding issues with 556 mags in my 300 blkout I tried several different makes of mags, magpul, Cproducts, hexmag and they all have the same issue , the bolt is not picking the round out of the mag going in to battery all the time.
Are magpul 300 blackout specific mags different than 556 magpul mags ?
Maybe if I try a different BCG!
ANY FEEDBACK IS WELCOME

I thank everybody for there input,
I think I have my feeding issue resolved.
I purchased some 300 blkout specific mags
Lancer and magpul and they both worked with no issues for 220 grain subsonic rounds,
AAC AND WINCHESTER whiebox ammo ,still waiting for my suppressor from silencer co which should be here soon I hope , I purchased in March 2023.

 

[unionguy]

+1 for Lancer mags.