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Reviews & Ratings for Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 Round Rifle Magazine — 14 reviews

(14 reviews)
Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 Round Rifle Magazine
Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 Round Rifle Magazine
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Most Helpful Positive Review Runs flawlessly!
I have these 20 rd 300 blackout pmags for a micro pistol build of mine. They ran all 20 rounds of AAC 110 grain vmax ammo without a single hesitation. Magpul has a bit of a loose tolerance compared to steel or aluminum magazines for a wide range of ammo types yet they feel solid when installed into the magwell. Stack these deep for training or shtf. I feel confident using them.
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magpul .300 blackout

by Nehemiah Bianchi, Verified Owner from OH, United States Written on March 6, 2026
It's magpul, same quality and reliability but optimized for .300 blackout. There's not much more to say about it, other than if you want/need a .300 blackout specific 20 rounder then look no further.
Would recommend: Yes
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Magpul PMAG

by Harry Kerr, Verified Owner from TX, United States Written on February 15, 2026
I have never had a Magpul pmag failure. They are always reliable!
Pros:
  • None
Cons:
  • None for me
Would recommend: Yes
Was it helpful to you? Yes | No
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300 blackout Magazine

by Kj, Verified Owner from OK, United States Written on January 7, 2026
Works great no issues so far will probably get a couple more
Would recommend: Yes
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PMAG 20 Gen M3, .300 AAC Blackout

by Mark, Verified Owner from FL, United States Written on May 2, 2025
Magpul will always be my first choice, switched all my Magazines to Magpul years ago. Be it 5.56 or 300 Blackout, Magpul quality stands alone.
Pros:
  • Performance and Quality
Cons:
  • None
Best Used for:
  • AR15
Would recommend: Yes
Was it helpful to you? Yes | No
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magpul 300 blackout mag

by John, Verified Owner from FL, United States Written on March 5, 2025
Great product. Great price. Optics planet is great
Would recommend: Yes
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Nice mags, it's MOE.

by Mike D, Verified Owner from FL, United States Written on February 26, 2025
I've got several of these mags. Yes you can use 5.56mm mags, but I like that they are specifically designed for 300Blk.
Would recommend: Yes
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Great alternative

by JakeFromStateFarm, Verified Owner from CA, United States Written on January 25, 2025
I bought this bcus i only have Lancer mags specifically for 300blk and i needed something else to help me work out the kinks with my build and make sure that my mags werent the reason for my ftf's. Still tuning to get lrbho but these mags are doing a great job as cheaper alternatives to Lancer.
Would recommend: Yes
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Magpul Industries PMAG GEN M3 AR-15 .300 Blackout 20 round magazine

by Johnny, Verified Owner from AZ, United States Written on November 29, 2024
Very slick design, springs are touchy and it feeds great. Will buy more of these in the future
Would recommend: Yes
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Good mag, excellent product.

by Kv, Verified Owner from MN, United States Written on October 26, 2024
Magazine feeds well, with no malfunctions. Works with all ammo used.
Would recommend: Yes
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Good quality mags!

by Wick, Verified Owner from OH, United States Written on September 9, 2024
These 20 round mags look great with pistol builds and fit a Ruger Ranch rifle perfectly.
Would recommend: Yes
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