Magpul PMAG Gen M3 AR-15 .300 Blackout 20-Round Magazine, Black

Overview

The Magpul PMAG Gen M3 AR-15 .300 Blackout Magazine is engineered specifically for rifles chambered in .300 AAC Blackout, delivering reliable feeding across the wide range of projectile weights and bullet profiles used in the caliber. Its compact 20-round design improves maneuverability and shooting from the prone position, while distinct visual and tactile features help differentiate it from standard 5.56 magazines to reduce the risk of cross-loading. Built with Magpul’s proven Gen M3 polymer construction, this magazine offers exceptional durability and dependable performance in demanding conditions.

Key Features

• Purpose-built for .300 AAC Blackout cartridges
• 20-round capacity in a compact magazine body
• Patented internal geometry optimized for a wide variety of .300 BLK bullet profiles
• Distinct rib design and upper texture for quick identification from 5.56 magazines
• Impact- and crush-resistant Gen M3 polymer construction
• Aggressive front and rear texturing for enhanced grip
• Compatible with Magpul Tactile Lock Plates and PMAG accessories
• Paint pen dot matrix for magazine identification
• Removable floorplate for easy cleaning and maintenance
• Made in the USA

Specifications

• Manufacturer: Magpul
• Model: PMAG Gen M3 AR-15 .300 Blackout
• Caliber: .300 AAC Blackout
• Capacity: 20 Rounds
• Platform: AR-15 / M4
• Material: Polymer
• Color: Black
• Compatibility: AR-15/M4, FN SCAR, IWI Tavor, and other STANAG 4179-compatible platforms
• NSN: 1005016999834

MPN: MAG1182-BLK

UPC: 840815132233

Applications

Ideal for hunting, target shooting, home defense, tactical training, and recreational range use with rifles chambered in .300 AAC Blackout. Its shorter profile makes it especially well suited for compact firearms, bench shooting, and prone shooting positions.

Additional Features

The PMAG Gen M3 incorporates visual and tactile differences from standard 5.56 magazines to help reduce the possibility of caliber mix-ups. Its advanced polymer construction, proven feeding geometry, and corrosion-resistant components provide long-lasting reliability in harsh environments.