Magpul PMAG Gen 3 magazines are designed for the DPMS LR308/SR-25 pattern AR rifles chambered in .308 Winchester. These magazines have quickly become the industry standard due to their extreme durability, reliability, and cost effectiveness. The Gen 3 magazines feature the new constant curve geometric body, anti-tilt follower and other minor improvements. The polymer magazine reduces overall magazine weight by half without sacrificing durability. Magpul LR/SR magazines are a must-have if you own a compatible .308 AR type rifle.