The Magpul PMAG GEN M3 20-round magazine delivers optimized feeding geometry specifically engineered for 300 Blackout cartridges in AR-15 platform rifles. This polymer magazine addresses the unique dimensional requirements of 300 BLK ammunition while maintaining the proven reliability of Magpul's third-generation PMAG design.
What Makes This Different
The GEN M3 incorporates Magpul's latest polymer formulation and improved follower design that ensures consistent feeding with both subsonic and supersonic 300 Blackout loads. The magazine body features enhanced drop protection compared to aluminum alternatives, while the optimized geometry reduces double-feeds and bolt-over-base malfunctions common with standard 5.56 magazines when loaded with 300 BLK cartridges. The 20-round capacity provides an ideal balance between ammunition capacity and overall rifle handling characteristics.Key Features
- Caliber-specific geometry optimized for 300 Blackout cartridge dimensions
- Impact-resistant polymer construction with textured grip surfaces
- Anti-tilt follower with constant-force spring for reliable feeding
- Flared floorplate for positive extraction and enhanced drop protection
- Paint pen dot matrix for easy identification and round counting
- Compatible with PMAG accessories including dust covers and pulls
- Fits standard AR-15/M4 magazine wells without modification
Technical Specs
- Capacity: 20 rounds
- Caliber: 300 AAC Blackout (.300 BLK)
- Material: Impact-modified polymer construction
- Compatibility: AR-15, M4, M16, SCAR 16S, HK416, and similar platforms
- Length: 7.1 inches overall
- Weight: 4.2 ounces unloaded
- Color: Black
- Country of Origin: USA
