C - Products 3023008175CPD: New from C Products Defense, the CPD Duramag Speed OD Green 30 Round Magazine. CPDs Duramag line is known for their durability, precision, and exceptional build quality. This CPD Duramag Speed AR-15 30rd OD Green Magazine is no exception. Its aluminum body holds together many key features: a Proprietary Liplock design that assures perfect round placement, a black, advanced geometry follower for smooth feeding, durable Teflon-360 coating technology that enhances magazine-wide performance & reliability, and EverFlex anti-fatigue spring technology.