Over 300,000 customers - we say thank you!

40,000+ products for hunting and shooting sports

840815132233 100075149
A Concealable Magazine Designed for the 300 Blackout Round
Magpul took inspiration from its PMAG 30 AR 300 B design, which was built specifically to give you a clearly labeled magazine designed to function perfectly with 300 Blackout rounds. The new PMAG 20 AR 300 B design incorporates all of Magpul's GEN 3 upgrades, and it gives you a more compact magazine that works well with your small rifle-caliber platforms. In addition to its smaller size, the Magpul PMAG 20 AR 300 B design gives you a safer way to shoot. Since the 300 Blackout functions in 5.56 NATO magazines and vice-versa, the risk of chambering a 300 Blackout round in your 5.56 NATO rifle is higher, and that can lead to a catastrophic malfunction. This PMAG has been designed with a distinct look and feel that allows you to tell the difference both by sight and feel to avoid sticking the wrong magazine into your gun. Each Magpul PMAG 20 AR 300 B design is made from Magpul's durable, rugged polymer and features an easy-to-remove baseplate for cleaning. You'll also get a dot matrix for organization, as well as a dust cover that also protects your feed lips from impacts. Like all of Magpul's products, this magazine is made right here in the USA.  
25.9 25.9 1 GBP
Product no.: 100075149
MAGPUL PMAG 20 AR300 B GEN M3 .300 AAC BLACKOUT 20RD FOR AR15 BLACK
Mfr Part: MAG1182-BLK 840815132233 Magpul took inspiration from its PMAG 30 AR 300 B design, which was built specifically to give you a clearly labeled magazine designed to function perfectly with 300 Blackout rounds. The new PMAG 20 AR 300 B design incorporates all of Magpul's GEN 3 upgrades, and it gives you a more compact magazine that works well with your small rifle-caliber platforms. In addition to its smaller size, the Magpul PMAG 20 AR 300 B design gives you a safer way to shoot. Since the 300 Blackout functions in 5.56 NATO magazines and vice-versa, the risk of chambering a 300 Blackout round in your 5.56 NATO rifle is higher, and that can lead to a catastrophic malfunction. This PMAG has been designed with a distinct look and feel that allows you to tell the difference both by sight and feel to avoid sticking the wrong magazine into your gun. Each Magpul PMAG 20 AR 300 B design is made from Magpul's durable, rugged polymer and features an easy-to-remove baseplate for cleaning. You'll also get a dot matrix for organization, as well as a dust cover that also protects your feed lips from impacts. Like all of Magpul's products, this magazine is made right here in the USA.
25.9 GBP 170 £25.90 *
1 In stock, delivery from UK warehouse within 2-3 days
Specs: Capacity: 20-Round Cartridge: 300 AAC Blackout Finish: Black Make: AR-15 Material: Polymer Quantity: 1

Top takeaways

  1. The PMAG 20 AR 300B GEN M3 is a compact magazine designed specifically for 300 Blackout rounds, featuring Magpul's GEN 3 upgrades.
  2. It has a unique design for easy identification to prevent mixing it up with 5.56 NATO magazines, reducing the risk of dangerous malfunctions.
  3. Constructed from durable polymer, it includes a removable baseplate for cleaning, a dot matrix for labeling, and comes with a dust cover to protect the feed lips.

Attributes

Capacity: 20-Round Cartridge: 300 AAC Blackout Finish: Black Make: AR-15 Material: Polymer Delivery weight: 0.132kg Shipping height: 25mm Shipping width: 114mm Shipping length: 267mm UPC : 840815132233

Item details

Made in USA
US export classification: 0A501.d



Discover the Magpul 20 AR 300B GEN M3 PMAG! 🔥 Compact, durable, and designed for 300 Blackout rounds—perfect for your AR-15!

A Concealable Magazine Designed for the 300 Blackout Round
Magpul took inspiration from its PMAG 30 AR 300 B design, which was built specifically to give you a clearly labeled magazine designed to function perfectly with 300 Blackout rounds. The new PMAG 20 AR 300 B design incorporates all of Magpul's GEN 3 upgrades, and it gives you a more compact magazine that works well with your small rifle-caliber platforms. In addition to its smaller size, the Magpul PMAG 20 AR 300 B design gives you a safer way to shoot. Since the 300 Blackout functions in 5.56 NATO magazines and vice-versa, the risk of chambering a 300 Blackout round in your 5.56 NATO rifle is higher, and that can lead to a catastrophic malfunction. This PMAG has been designed with a distinct look and feel that allows you to tell the difference both by sight and feel to avoid sticking the wrong magazine into your gun. Each Magpul PMAG 20 AR 300 B design is made from Magpul's durable, rugged polymer and features an easy-to-remove baseplate for cleaning. You'll also get a dot matrix for organization, as well as a dust cover that also protects your feed lips from impacts. Like all of Magpul's products, this magazine is made right here in the USA.  
4.3
In stock
£31.90
5
In stock
£21.90 £19.90 - £54.90
 
3.3
In stock
£22.90
Back to top