The Zev Technologies™ Extended Magazine Release for Glock® is easy to install and Machined from Billet Aluminum then Hard Anodized. This magazine release is a must for any Glock® owner. CNC Aircraft Quality Billet Aluminum. Black Hard Anodize Mag-release body. Textured button face. Black Hard Anodize button or Silver un-anodized button. Drop in replacement. ZEV Parts always incorporate design, feel and performance.