The Ruger® AR-556® SR-556 Takedown 300 Blackout 30-Round Magazine is a genuine Ruger factory magazine, constructed of 410 stainless steel with a corrosion-resistant Teflon coating for unmatched reliability and superior durability in the field. The robotically-welded body delivers snag-free performance, while LIPLOCK™ technology keeps rounds secured and aligned for reliable feeding, and the Advanced Geometry Follower™ remains level for added stability. Better yet, the EVERFLEX™ anti-fatigue steel spring holds its shape without stretching or binding for lasting field performance, while the removable floor plate allows for quick disassembly when maintenance and cleaning are required. Made in USA.