Description
The Magpul PMAG Gen M3 10-round magazine brings full-sized performance to a compact package. Made from reinforced polymer and built in the USA, this magazine gives you the same crush and impact resistance you get from larger capacity options, just in a streamlined form factor that fits nearly flush in your magwell.
Engineered for Low-Profile Use
At only about 3 ounces, this 10-rounder makes bench rest and prone-position shooting much more comfortable. There's no magazine hanging below your lower receiver to get in the way when you're shooting over sandbags or a range bag. The compact profile also makes it lighter to carry, which adds up when you're hiking into the field or working through a long day at the range.
Built to the Gen M3 Standard
This magazine packs all the features you get from Magpul's latest generation. You're looking at a long-life stainless steel spring, a four-way anti-tilt follower that handles dirt and adverse conditions better than previous designs, and constant-curve internal geometry for smooth, reliable feeding every time. The over-insertion stop prevents you from jamming the magazine too far into the mag well, which means faster, more confident reloads. Textured front and rear grips give you a solid hold even with wet or muddy hands.
Smart Design Details
Magpul included an impact/dust cover to keep debris out of loaded or unloaded magazines and protect the feed lips from getting banged up in storage. The slim floorplate fits tighter magazine pouches better than earlier designs, and there's a paint-pen dot matrix molded into the base so you can mark it however you need—your initials, caliber designation, or magazine number. The whole thing comes apart tool-free for easy cleaning.
Key Specifications
- Manufacturer: Magpul Industries
- Model: PMAG Gen M3
- Manufacturer Part Number: MAG559-BLK
- UPC: 873750006192
- Caliber: 5.56x45mm NATO / .223 Remington
- Capacity: 10 Rounds
- Material: Impact and Crush-Resistant Polymer
- Color: Black
- Spring: Long-Life Stainless Steel
- Follower: Four-Way Anti-Tilt, Low-Friction
- Internal Geometry: Constant-Curve
- Weight: 3 ounces
- Floorplate: Slim Flared Design
- Country of Origin: USA
What’s Included
- 1x Magpul PMAG Gen M3 10-round magazine
- 1x Pop-off impact/dust cover
Frequently Asked Questions
Will this 10-round PMAG fit in standard AR-15 magazine pouches?
Yes, the slim floorplate on Gen M3 magazines fits better in tighter pouches than earlier generations. The compact profile still sits securely in most double and triple magazine pouches designed for standard 30-round mags. Some users report that pouches sized for 20-round magazines offer an even snugger fit.
Is the Gen M3 10-rounder compatible with rifles other than standard AR-15s?
The Gen M3 geometry is optimized for Colt-spec AR-15 and M4 platforms and will function reliably in those systems. Magpul also engineered the Gen M3 to work with non-Colt-spec platforms like the HK416, SCAR 16S, and British SA-80. Always test your magazines in your specific rifle to confirm fit.
What's the difference between this Gen M3 and the older Gen M2?
The Gen M3 features a stronger polymer formula, a more refined four-way anti-tilt follower with lower friction, and an over-insertion stop to prevent jamming the mag too far into the well. The Gen M3 also includes aggressive texturing for better grip control and comes with an impact dust cover. Both are reliable, but the Gen M3 handles extreme temperatures and heavy use better.
Can I use this magazine with other calibers like .300 Blackout?
The PMAG Gen M3 10 is designed for 5.56×45 NATO and .223 Remington. While some users report success running other cartridges, the magazine is optimized for these calibers. For best results with other rounds like .300 Blackout, Magpul makes purpose-designed magazines specifically sized for those loads.






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