Constructed of durable, yet lightweight 410 stainless steel with a corrosion-resistant T-360™ coating, the Duramag® AR-15 .350 Legend 10-Round Magazine offers unmatched durability and longevity in adverse conditions. Caliber-specific rib geometry ensures reliable feeding and internal round stacking, while the LipLock feed lip design keeps rounds secured and in proper alignment for jam-free reliability. Better yet, the EverFlex™ anti-fatigue steel spring and the Advanced Geometry Follower™ protect against binding and deliver smooth feeding performance you can count on.