Magpul PMAG 30 AR 300 B GEN M3 .300 Blackout 30-Round Magazine

The Magpul PMAG 30 AR 300 B GEN M3 is a purpose-designed detachable magazine for rifles chambered in .300 AAC Blackout. Unlike a general-purpose 5.56 NATO magazine, this model uses internal geometry developed around the broad range of projectile shapes and weights encountered in .300 BLK ammunition. That cartridge-specific design makes it a practical choice for shooters who use everything from compact supersonic loads to long-profile subsonic ammunition and want a magazine built for the caliber rather than adapted from another application. Its 30-round body is molded from Magpul’s impact- and crush-resistant polymer and incorporates the established handling features of the GEN M3 family. Aggressive texture at the front and rear provides a secure gripping surface during loading, removal and magazine changes, while the slim floorplate is easy to remove when routine cleaning or maintenance is required. A paint-pen dot matrix near the bottom allows magazines to be marked for identification, ammunition management or individual assignment. The body also has distinctive ribbing and a smoother upper section that create a noticeable visual and tactile difference from standard 5.56 PMAGs. This differentiation is particularly useful for owners who operate both .300 Blackout and 5.56 NATO firearms and need a straightforward way to keep loaded magazines organized. The magazine is compatible with most STANAG 4179-pattern firearms chambered for .300 Blackout, including common AR15 and M4-pattern platforms as well as other compatible designs. It also accepts most accessories intended for 5.56x45 NATO PMAG magazines. Finished in black and manufactured in the United States, this PMAG combines caliber-specific feeding geometry with durable construction, practical handling texture and clear identification features for range, hunting, training and defensive rifle setups.

Specifications and Features:

• 30-round capacity
• Designed specifically for .300 AAC Blackout ammunition
• Black impact- and crush-resistant polymer construction
• Optimized internal geometry for varied .300 BLK bullet profiles
• Distinct ribbing and upper-body texture aid caliber identification
• Aggressive front and rear gripping texture
• Slim removable floorplate and paint-pen marking matrix
• Compatible with most STANAG 4179-pattern .300 BLK platforms
• Made in the USA
• Brand: Magpul
• Series: PMAG GEN M3
• Product Type: Detachable Rifle Magazine
• Manufacturer Part Number: MAG800-BLK
• UPC: 840815117223