Magpul PMAG 30 Gen M3 300 Blackout AR-15 Magazine - 30 Round

Manufactured by Magpul Industries
Manufactured by Magpul Industries
28 Reviews
Click Here for Price $12.88 $15.15

In Stock

Standard orders will ship out 2 business days if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

Magazines considered High Capacity are controlled by the ATF and/or local jurisdictions are not available for purchase/shipment in all areas.



The PMAG 30 AR 300 B GEN M3 is a dedicated magazine for rifles chambered in 300 Blackout. While standard AR-15 magazines may be used for this cartridge, the potential danger exists to chamber and fire a 300 Blackout round in a 5.56 NATO chamber with catastrophic results.

Optimized for 300 AAC Blackout, the PMAG 30 AR 300 B retains all the GEN M3 features adding a distinct rib design and smoother upper texture to set them apart from other PMAGs for quick visual and tactile identification. This AR mag is easy to disassemble and clean for regular maintenance and won't fail you in the field.

  • Dedicated 300 Blackout magazine
  • Impact and crush resistant polymer construction
  • Optimized internal geometry for 300 BLK
  • Anti-tilt, self-lubricating follower
  • Long life USGI-SPEC stainless steel spring
  • Over-travel insertion stop
  • Distinct rib design and smoother upper texture for easy identification
  • Aggressive front and rear texture
  • Paint pen dot matrix panels
  • Flared floorplate
  • Pop-off impact/dust cover

Magpul continues to grow and develop based on innovation, simplicity, and efficiency. At Magpul, mission driven requirements inform their product design, materials, and manufacturing, focusing on efficiency without sacrificing quality or performance.
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Caliber Gauge300 Blackout
Magazine Capacity30
PlatformAR-15 Magazines

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

28 reviews

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Perfect Magazine for 300 blackout

by -

This magazine simply works 100% better than using a 5.56 magazine for a 300 Blackout. This magazine is easier to load than a 5.56 mag and will run through your 300 blackout setup like a charm!


by -

You can never go wrong w Magpul. Primary has better prices than most competitors, so this is my one stop shop.

Affordable ...very reliable


Yes a 5.56 mag will work most of the time
<br>This mag designed for a 300 acc works 100% of the time or at least the 1200 or so rounds I've used them for
<br>Also on the mag 300 BLK is engraved
<br>A buddy shoots subsonic a lot,,he had problems with 5.56 mags...NO problems with this mag on subsonic ammo


by -

This is made for 300 blackout ammo. Don’t use the 556 cause you will run into misdeeds. Worked like a charm

Pmag 300 AAC M3

by -

300 AAC dedicated pmag. Functions like 5.56 pmag just has an identifier for 300 AAC on the side.

As usual

by -

Durable and reliable. Now if magpul would please make a 7.62x39 mag for the AR15.

No issues

by -

As always, Magpul never disappoints. I’ve had no issues at all. Only thing I would recommend is proper labeling to identify mags when your on the go.

It's a Magpul product

by -

It's from Magpul, made in USA, and designed to work well in all conditions. Glad to see that somebody is making a quality mag specific to 300 Blk.