MAGPUL PMAG M3 300BLK 30RD BLK

SKU: LIP|MPMAG800-BLKUPC: 840815117223Mfr. Part #: MAG800-BLK

$16.10

MAGPUL PMAG M3 300BLK 30RD BLK

Warehouse inventory: 971 available

Store inventory: Not in store

Compare
SKU: LIP|MPMAG800-BLK Category: Tag:

Description

The PMAG 30 AR 300 B GEN M3 is a purpose-designed magazine for rifles chambered in 300 Blackout. Since its inception, 300 Blackout shooters have had to use a magazine designed for another cartridge, limiting its ultimate performance and compatibility. One of the nice features of 300 Blackout is the compatibility with 5.56x45mm parts, but with the magazine it is a compromise to do so. Due to the wide variety of projectile weights and profiles potentially decreasing overall reliability, a dedicated 300 Blackout magazine was a logical step for the PMAG line. In addition to the performance gained by a dedicated mag, the PMAG 30 AR 300 B also offers a safer way to feed your 300 Blackout rifle. When using 5.56x45mm mags, the potential to chamber and fire a 300 Blackout round in a 5.56x45mm rifle with catastrophic results requires diligent ammunition management by the shooter. The PMAG 30 AR 300 B’s distinct rib 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.

Additional information

upc

840815117223

manufacturer

Magpul Industries

Manufacturer Part Number

MAG800-BLK

Caliber/Gauge

.300 AAC Blackout

Capacity

30

Model

PMAG

Model Fit

AR-Platform

Product Type

Magazine

Quantity

1

Shipping Weight

0.3

County Armory Spartan helmet emblem

Deals, New Arrivals & 2A News

Join Our Newsletter

Be the first to hear about new inventory, in-store specials, and updates that matter to gun owners.

Thanks for subscribing! Watch your inbox for deals and news.

Firearms Articles & Long Range Technology

County Armory 2A News

Check out the latest information on new products, long-range rifles, custom builds, laser engraving and more at County Armory.

Suppressors are becoming one of the biggest stories in the firearms market

June 11, 2026

Suppressors Are Becoming One of the Biggest Stories in the Firearms Market

The federal suppressor tax stamp dropped from $200 to $0 in 2026, making suppressor ownership more accessible than in decades.

Learn More
DOJ and ATF move forward with major firearms regulation reforms

June 11, 2026

DOJ and ATF Move Forward With Major Firearms Regulation Reforms

The DOJ and ATF announced sweeping reforms to modernize firearms rules and ease compliance burdens on gun owners and FFLs.

Learn More
Search
×

Select at least 2 products
to compare