.300 Black Out Magazines

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  • Pinecone

    Ultimate Member
    MDS Supporter
    Feb 4, 2013
    28,175
    What mags are you using for .300 BO in an AR?

    I know that standard Magpuls are not good due to the internal ribs. They do have a .300 BO mag, are they good to go?

    Others?

    Thanks.
     

    Speed3

    Ultimate Member
    Aug 19, 2011
    7,816
    MD
    I have a few AR stoner 20rd mags that work fine. I haven't looked at the magpul 300blk specific mags.
     

    scout6

    Active Member
    Sep 28, 2016
    599
    Ceciltucky
    I use the 300blk out mags from magpul, bought the dyeable bottoms to color offset them from others.
     

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    DivingDriver

    Ultimate Member
    MDS Supporter
    Jan 14, 2016
    1,514
    Nanjemoy MD
    I use Lancer mags. They have a steel feed lips plus you can't mistake them for the magpul ones that I use for the .223 / .556 AR. Lancers are translucent so a quick visual makes sure I've grabbed the right one. These are Chad approved.
     

    cstone

    Active Member
    Dec 12, 2018
    842
    Baltimore, MD
    FDE Magpuls for me. I use black for .223 and OD for 5.45. Hand guards on each firearm matches the caliber to reduce confusion.
     

    LimaVictor

    Ultimate Member
    Mar 9, 2012
    2,245
    Southern MD
    I use the 20rd Lancer 300blk mags. Didn't have any problems with supers or subs (200 & 220). And as stated above, there is no mistaking the difference between them and the magpuls I use for 556/223.
     

    alucard0822

    For great Justice
    Oct 29, 2007
    17,643
    PA
    Haven't had a problem with Magpul Gen2s, although do havee 300BLK mags too, they do seem to stack a little cleaner in the 300 mags, but apparently the normal gen 2s are close enough to feed 100%. This is with 150gr FMJs, 110gr v-max and 220gr Berrys in subs, might have some issues with really fat nosed bullets, but all I shoot are spire point. I don't do the whole different mags/color combos when shooting 300 with 5.56, I just look at the ammo when I slap a mag in, keep the ammo sources separate, and usually keep one cased when shooting the other caliber. Guess I could use bands or something to make sure there isn't a mixup, but IMO it's more likely and dangerous to get a 300BO or two mixed into a box of my 5.56, so that is what I spend most of my attention on preventing.
     

    smokey

    2A TEACHER
    Jan 31, 2008
    31,412
    I use troy battle mags for the 300. A 40 rnd pmag is on the left and troy battle mag on the right. The battle mag ridges are more rounded at the rear and slightly further forward. They dont interfere as much as pmags do with longer blackout bullets.

    They also give you an additional layer of protection against mixing 5.56 and blackout.
     

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    holesonpaper

    Active Member
    Mar 10, 2017
    913
    Hazzard county
    What grain rounds?

    I am looking at around 200 grain bullets for subsonic with suppressor.

    I’ve used 110 all the way up to 220. Never had a single issue with the pmags and I shoot both suppressed and not. The only issue I ever had was with a lighter 110 round separating from the casing but that was the round, not the magazine and it only occurred once.

    Personally I’m not against specific 300blk pmags, just haven’t had a need - and I have two 300blk rifles.
     

    John from MD

    American Patriot
    MDS Supporter
    May 12, 2005
    22,734
    Socialist State of Maryland
    What mags are you using for .300 BO in an AR?

    I know that standard Magpuls are not good due to the internal ribs. They do have a .300 BO mag, are they good to go?

    Others?

    Thanks.

    Buy one 300 Magpul and then file the guide rails on your .223 mags to the same thickness as the 300 Magpul. I did this both to Magpuls and Lancers for my 300 BO and 7.62x40WT mags. The cheapest I ever found the 300 Magpuls for was $20 so it is cheaper converting the .223 mags.
     

    CrabcakesAndFootball

    Active Member
    Jun 14, 2017
    697
    What grain rounds?

    I am looking at around 200 grain bullets for subsonic with suppressor.

    I use standard 5.56 magpul gen 2 and 3 mags for 200 and 220 grain 300 bo and never had an issue. I think the ammo was a mixture of hornady, magtech and sig, but I don't recall off the top of my head which grain was which.
     

    rockstarr

    Major Deplorable
    Feb 25, 2013
    4,592
    The Bolshevik Lands
    my suggestion is get the magpul 300blk gen 3 mags, and use a white out pen to color in 300. that should stand out like a sore thumb if you do not feel comfortable with just looking at the ammo.

    Also, another idea, is when visiting the range, take only a .556 or a .300blk firearm with the corresponding ammunition with you.
     

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