The Magpul PMAG M3 5.56 is a durable 30-round magazine for AR-15 rifles with a round-count window. Perfect for range training, competition shooting, and reliable backup capacity.
Update, October 9, 2026: ATF no longer requires a Form 4, tax stamp, fingerprints or registration for suppressors, short-barreled rifles, short-barreled shotguns or AOWs. They now transfer on a standard Form 4473 with a background check. Anything below that mentions a Form 4, a wait or a tax stamp was written before this change. What changed
The Magpul PMAG M3 5.56 is a proven 30-round magazine for AR-15 and M4 rifles chambered in 5.56 NATO or .223 Remington. This magazine delivers dependable performance through thousands of rounds. Additionally, it features Magpul’s latest M3 platform technology with improved feeding geometry.
Key Features
The PMAG M3 includes a round-count window on the side. This window lets you see exactly how many rounds remain loaded without unloading. Furthermore, the magazine uses reinforced polymer construction for durability. The witness holes are clearly visible through the transparent window design. The distinctive olive drab green finish matches tactical equipment and hunting gear.
Reliable Performance
Magpul magazines are tested extensively for reliability and durability. The reinforced feed lips prevent deformation under heavy use. Therefore, this magazine maintains reliability even after extended storage or deployment. The PMAG M3 works flawlessly with standard AR platform rifles.
Perfect for Range Training and Competition
The round-count window is ideal for range training and competition shooting. You can quickly check magazine capacity without stopping to unload. Moreover, the PMAG M3 has earned trust from military, law enforcement, and civilian shooters. Each magazine comes ready to load and use immediately with no assembly required.
Ordering from Western Sport
Order online and it ships straight to your door. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.
Frequently Asked Questions
Q: Will the Magpul PMAG M3 5.56 work with my AR-15?
A: Yes, the PMAG M3 5.56 is fully compatible with all standard AR-15 and M4 rifles. It works with both mil-spec and commercial-spec lower receivers chambered in 5.56 NATO or .223 Remington.
Q: What is the round-count window and how does it help?
A: The round-count window allows you to see exactly how many rounds remain loaded. This feature saves time during range training, hunting, and competition shooting by letting you check capacity without unloading.
Q: Does Magpul warranty the PMAG M3 magazine?
A: Yes, Magpul magazines include a limited lifetime warranty against manufacturing defects. The warranty covers normal use and does not include damage from misuse or abuse.
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