Stock Status: Magpul PMAG 20 AR 300 B GEN M3 .300 Blackout 20-Round Magazine - Black
The Magpul PMAG 20 AR 300 B GEN M3 is a purpose-built .300 AAC Blackout magazine for AR-15 and M4-pattern firearms. Its modified internal geometry is designed around the wide range of bullet profiles and projectile weights used in 300 BLK ammunition, supporting consistent feeding without relying on a magazine optimized for 5.56 NATO.
Its compact 20-round body improves maneuverability, works well from prone positions, and reduces bulk on short-format firearms. A distinct rib pattern and smooth upper-body texture provide visual and tactile differentiation from 5.56 PMAGs, helping users organize ammunition and reduce the risk of cross-loading.
Key Features
- Dedicated internal geometry for .300 AAC Blackout cartridges
- Impact- and crush-resistant GEN M3 polymer construction
- Aggressive front and rear texture for positive handling
- Self-lubricating anti-tilt follower and long-life stainless-steel spring
- Paint-pen dot matrix for load identification
- Removable slimline floorplate for cleaning and maintenance
- Compatible with applicable PMAG GEN M3 accessories and Magpul Tactile Lock Plates
Product Specifications
- Brand: Magpul
- Model: PMAG 20 AR 300 B GEN M3
- Caliber: .300 AAC Blackout / 300 BLK
- Capacity: 20 rounds
- Platform: AR-15 / M4 and compatible STANAG 4179-pattern firearms chambered in .300 Blackout
- Material: Reinforced polymer
- Color: Black
- Manufacturer Part Number: MAG1182-BLK
Compatibility
Designed for .300 AAC Blackout firearms that accept AR-15/M4-pattern magazines, including many compatible FN SCAR and IWI Tavor configurations. Use only with the correct caliber firearm and ammunition.
Important Information
Magazine capacity and availability are subject to federal, state, and local law. Confirm that this magazine is legal in your jurisdiction before ordering.
Made in the USA.
