Manufacturer: Thermold AR1803045
Thermold AR-18 and AR-180 30 round magazine with optional 45 round capacity. .223 Remington and 5.56mm calibers, black.
Unlike metal magazines, Thermold products won't jam because they're made with a nylon that resists heat, dirt and rust. Abuse them, drop them, throw them in the mud. They are dent resistant, self lubricating and non-corrosive.