C Products Defense DuraMag Magazine for AR-15 Features The C Products Defense DuraMag SS Magazine is machined from 410 stainless steel a material chosen for its strength and resistance to corrosion compared to standard magazine alloys. Advanced interior and exterior geometries specific to the 400 Legend cartridge are built into the body ensuring the rounds stack and feed correctly rather than relying on a generic AR-15 pattern magazine not designed for this round s dimensions. A T-360 coating is applied over the stainless steel to improve wear resistance and long-term durability helping the magazine perform consistently through harsh field conditions. The yellow anti-tilt AGF follower not only improves feeding reliability but also offers an at-a-glance visual cue that distinguishes this magazine from standard 5.56 pattern magazines. Because the magazine is built from stainless steel rather than polymer it will not flex or swell from extended loaded storage or temperature swings the way polymer bodies can over time. The 400 Legend caliber marking is stamped on both the magazine body and the follower itself making it easy to identify the correct magazine even when mixed in with other AR-15 magazines. This DuraMag SS magazine is rated safe for long-term loaded storage making it a dependable choice for a dedicated hunting or defensive rifle that may sit loaded for extended periods. For 400 Legend AR-15 owners who want a magazine built specifically for their cartridge the DuraMag SS 10-round magazine is available for sale at GrabAGun. C Products Defense DuraMag Magazine for AR-15 Specifications Manufacturer: DuraMag Model: DURAMAG SS Caliber: .400 Legend Capacity: 10 Rounds Color: Black Material: Stainless Steel Follower: Yellow Anti-Tilt AGF Compatible Hosts: AR-15 Available At: GrabAGun