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4.9 out of 5 stars. 64 reviews
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Magpul PMAG GEN M3 20 Round 300 Blackout Magazine for AR-15, Black, Polymer

  • New Arrival

Magpul PMAG GEN M3 20 Round 300 Blackout Magazine for AR-15, Black, Polymer

Item # 612054099

Magpul Magpul PMAG GEN M3 20 Round 300 Blackout Magazine for AR-15, Black, Polymer
Magpul Magpul PMAG GEN M3 20 Round 300 Blackout Magazine for AR-15, Black, Polymer
$15.99


Notice:
This Item cannot be shipped to CA, CO, CT, DE, DC, HI, IL, MD, MA, NJ, NY, OR, RI, VT, WA.
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  • New Arrival

Magpul PMAG GEN M3 20 Round 300 Blackout Magazine for AR-15, Black, Polymer

Item # 612054099

Magpul Magpul PMAG GEN M3 20 Round 300 Blackout Magazine for AR-15, Black, Polymer
Magpul Magpul PMAG GEN M3 20 Round 300 Blackout Magazine for AR-15, Black, Polymer

$15.99

This item is available online only

Delivery to

Free standard delivery on online footwear & Clothing purchases of $49 and over.


Notice:
This Item cannot be shipped to CA, CO, CT, DE, DC, HI, IL, MD, MA, NJ, NY, OR, RI, VT, WA.
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Neighbor’s Club Members earn points with purchases.

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The PMAG 20 AR 300 B GEN M3 is a purpose-built magazine for rifles chambered in .300 Blackout (300 BLK). Similar in every way to our PMAG 30 AR 300 B, the PMAG 20 is more compact for increased maneuverability and creates a more concealable package for use in small format firearms. The PMAG 20 AR 300 B's distinct ribbed design and smoother upper-half texture provides the shooter a distinct visual and tactile difference from any other PMAG to mitigate dangerous cross-loading issues. Made in the USA.

  • PMAG 20 AR 300 B GEN M3 is a magazine built for .300 Blackout (300 BLK) rifles
  • Purpose-built and similar in concept to the PMAG 30 AR 300 B, but more compact
  • More compact design improves maneuverability and helps create a more concealable setup for small-format firearms
  • Features a distinct ribbed design and a smoother upper-half texture
  • Designed to provide a clear visual and tactile difference from other PMAGs to help mitigate dangerous cross-loading issues
  • Made in the USA
  • Firearm Fitment: AR-15
  • Caliber: 300 Blackout
  • Capacity: 20rd
  • Color: Black
  • Material: Polymer
  • Max Capacity: 20

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Reviews

Rating Snapshot

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59 reviews with 5 stars.
4 reviews with 4 stars.
1 review with 3 stars.
0 reviews with 2 stars.
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Overall Rating

4.9
53 out of 54 (98%) reviewers recommend this product

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Summary of Reviews

AI-generated from customer ratings & reviews, and may include incentivized reviews.
Customers overwhelmingly praise these magazines for exceptional reliability and flawless performance, with reviewers reporting "never jammed" operation and 100% consistency across platforms. The 300 Blackout-specific design eliminates feeding problems experienced with standard alternatives, proving ...
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1 to 4 of 64 Reviews .
1 – 4 of 64 Reviews
Ohio
Review 1

300 Blk mags

3 months ago
I buy these magazines like my life depends on them because it does. I trust Magpul , it’s a Jarhead thing!

Yes, I recommend this product.

Originally posted on Magpul

Missouri
Review 1

Using the correct mag with 300BLK is pretty import

9 months ago
Great! Using the correct mag with 300BLK is pretty important for reliable feeding.

Yes, I recommend this product.

Originally posted on Magpul

Kyiv, Ukraine
Review 1

Unclear Restriction of Coyote PMAGs

10 months ago
My friends and I use various models magazines of PMAGs from Magpul.With a little tuning in the form of self-adhesives made of textured rubber 3M. On the SIG SAUER MCX-SPEAR LT IR 5.56 11.5" RIFLE-PISTOL we also use the MCX-SPEAR LT 9" UPPER AR CONVERSION KIT 300BLK - FDE. I have only positive emotions from using PMAGs. The quality of Magpul products is beyond praise. BUT!!! There is a small "fly in the ointment" in this "barrel of honey". For safety reasons, we use only Coyote-colored PMAGs for the 5.56x45 caliber, and exclusively black PMAGs for the 300BLK. So as not to mix up the cartridges and not to send a 7.62x35 cartridge into the 5.56x45 chamber. Which leads to big problems. Magpul produces black PMAGs in three sizes: 10, 20 and 30 rounds. We use all three sizes of PMAGs in different conditions. BUT, for some completely incomprehensible reason, Magpul does NOT produce PMAGs in Coyote color in sizes less than 30 rounds. Despite the fact that Magpul has all the technical capabilities and material (plastic) of Coyote color and molds of the required size. We would really like Magpul to have PMAGs in Coyote color in its assortment in sizes of 10 and 20 rounds. And accordingly, everyone will be able to have them in their arsenal. And safely use different calibers of cartridges on multi-caliber weapon platforms, such as MCX-SPEAR and similar. Differentiation of PMAGs by color for different calibers of cartridges significantly reduces the error compared to the use of small rubber rings with inscriptions. I really, really hope that Magpul will take our needs into account and in the near future will start releasing PMAGs magazines in sizes 10 and 20 rounds also in Coyote color!

Yes, I recommend this product.

Originally posted on Magpul

Review 1

Not with DDM4 PDW 300 Blackout

11 months ago
Not for DDM4 PDW 300 blackout. I had to take the gun to a gunsmith and he quickly pointed out a magazine feeding issue. He could see the round wasn’t sitting high enough on the feeding ramp. Mag sits loosely as well. Dremeled the ridge off the back of the magazine and they were able to seat slightly higher for more reliable loading.

No, I do not recommend this product.

Originally posted on Magpul