USED Duramag Speed Rifle Magazine 5.56 .223 300BLK 10-Round Anodized T360 Coatin Red 10rd 10RD. These battle-proven magazines are lightweight durable and have been the magazine of choice for OEM Law Enforcement and Military units throughout the world since we began producing in 2011. DURAMAG Speed bodies are constructed of 6061-T6 aluminum and are type-III hard-coat anodized. Unlike other magazines that use inferior coatings to color their USGI style magazines our wide range of colors are part of the anodizing process and thus a part of the metal. These magazines and are safe for extended storage while loaded and will not flex or swell like polymer. With our Progressive die tooling Post and Hole design and fully robotic welding you can truly depend on these magazines to be consistent every time you buy them guaranteed. Color Disclaimer: Due to the chemical process that takes place during Type 3 Hard-coat anodizing product color finish can vary from one magazine to the next even in the same batch. During the final Quality Control process our team has an acceptable range for each color hue and rejects any magazine outside this color range. Specifications for Duramag Speed 5.56 .223 300BLK 10-Round Magazine: Manufacturer: Duramag Finish: T360 Coating Fabric/Material: 6061-T6 Aluminum Magazine Capacity: 10 Round Caliber: 5.56x45mm NATO .300 AAC Blackout .223 Remington Gun Make: AR Platform Gun Model: AR-15 Quantity: 1 Package Contents: Duramag Speed 5.56 .223 300BLK 10-Round Magazine What firearm models does the manufacturer say Duramag Speed 5.56 .223 300BLK 10-Round Magazine is compatible with? The manufacturer suggests that Duramag Speed 5.56 .223 300BLK 10-Round Magazine is compatible with AR-15Duramag 3023004175CPDL10-10RD: Speed Rifle Magazine 5.56 .223 300BLK 10-Round Anodized T360 Coatin Red 10rd