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.
Since its inception, 300 BLK shooters have had to use a magazine designed for another cartridge, limiting that round’s ultimate performance and compatibility. One of the key features of 300 BLK in the past has been its compatibility with 5.56x45mm magazines. However, even with moderate success with that particular magazine, it is a compromise to do so, with reliability and safety both being at risk.
In addition to the performance gained by a dedicated mag, the PMAG 20 AR 300 B also offers a safer way to feed your 300 BLK rifle. When using 5.56x45mm mags, the potential to chamber and fire a 300 BLK round in a 5.56x45mm rifle with catastrophic results requires diligent ammunition management by the shooter. 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.
Along with optimized 300 BLK performance, the PMAG 20 incorporates all of our GEN M3 features, including our next-generation impact and crush resistant polymer, aggressive front and rear texture, an easily removable slim floor plate, and a paint pen dot matrix for marking and identification.
Made in the USA.
PURPOSE-BUILT MAGAZINE ONLY FOR 300 BLK
Dedicated, reliable magazine for rifles chambered in 300 BLK that supports the differing geometries found in that caliber
20-round body is more compact for increased maneuverability, creating a more concealable package for use in small format firearms
DESIGNED WITH VISUAL & TACTILE DIFFERENCES
Distinct rib design and texture provide visual and tactile differentiation from other PMAGs to mitigate dangerous cross-loading issues
INCORPORATES THE SAME FEATURES AND PERFORMANCE OF THE GEN M3 LINE
Next-generation impact and crush-resistant polymer, aggressive front and rear texture, easily removable slim floor plate, and a paint pen dot matrix
EXPORT NOTICE: This is an item controlled for export by the Export Administration Regulations (EAR) under the Commerce Control List (CCL). These controls take the form of export regulations and license requirements. As part of the express consideration provided for receipt of Magpul's goods, technical data and/or services, you, our customer, acknowledge that the export, re-export or other transfer, directly or indirectly, of the goods, technical data and/or services provided by Magpul in violation of U.S. law is prohibited. Customers acquiring controlled goods, technical data and/or services from Magpul shall be responsible for obtaining any necessary U.S. or other government authorization required to ensure compliance with applicable export laws. (See Magpul Compliance Notices page for more information).
PLEASE NOTE: Certain U.S. jurisdictions restrict firearm magazines sales. Magpul Industries cannot process sales/shipments prohibited by law. A list of states and municipalities restricting firearm magazine sales is available here.
WARNING: Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. Magpul Industries shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product.
Technical Specifications
More Information
Caliber
.300 AAC Blackout
Platform
AR15, M4, M16
Capacity
20 rds
Compatibility
Wide compatibility with most 'STANAG 4179' platforms such as the AR15/M4, FN SCAR, IWI Tavor, and others
MADE & ENGINEERED IN THE USA
FREE SHIPPING
on orders over $75 
100% SATISFACTION
guaranteed 
