The 7.62×51 NATO (.308 Winchester) PMAG 20 LR/SR GEN M3 is a lightweight, cost effective, highly reliable magazine for SR25/M110 pattern rifles. It features true 20-round capacity, a constant-curve body, an anti-tilt follower, and a snap on impact / dust cover. The GEN M3 PMAGs feature a long-life stainless steel spring, an anti-tilt, self-lubricating follower, and constant-curve internal geometry for reliable feeding. Low profile ribs and an aggressive front and rear texture give positive control of the GEN M3 in all environments, and a paint pen dot matrix at the bottom panel of the body to allow easy marking by the end user for identification. The easy-to-disassemble flared floorplate aids extraction and handling of the magazine while providing improved drop protection, and better compatibility with tight double and triple magazine pouches. An included pop-off impact / dust cover can be used to minimize debris intrusion and protect against potential damage to the top cartridge during storage and transit. Its simple, tool-less disassembly makes for easy cleaning and maintenance. Designed specifically for SAAMI-spec ammunition, the PMAG 20 LR/SR GEN M3 is less than half the weight of standard issue steel magazines and maintains a service life round count approximately equal to the rifle barrel itself.