There was a time when a 40-round magazine seemed to be almost de rigueur for an automatic rifle, then they seemed to fall out of fashion.
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Now it looks as though where the iconic RPK led, MagPul follows. Today they announced their 40-round M3 PMAG, specifically designed to be fully compatible with many types of AR and NATO STANAG platforms….

The 40-round PMAG is only 2 1/8″ longer than its 30-round brother but gives you 10 more rounds. The M3 PMAGs feature a re-designed bolt catch notch and a protruding lip on the magazine spine to prevent over-insertion into the mag well – which would cause a stoppage.
The M3 PMAGs also incorporate new material technology and manufacturing processes for enhanced strength, durability, and reliability to exceed military specifications.
Finally, modified internal and external geometry permits operation with a wide range of non Colt-spec platforms such as the HK® 416 and MR556A1, M27 IAR, British SA-80, FN® SCAR™ MK 16/16S, and others.
Manufacturers Suggested Retail Price is $19.95. The 40-Round M3 PMAG is prohibited in several states and is also an ITAR restricted item.











