The Rival Arms RA72G001A Extended Mag Release boasts a design optimized for comfort and usability. Its angled orientation ensures easy access, whereas its sleeker profile minimizes the risk of unintended releases. The construction features high-grade aluminum and comes complete with a mag release spring.Please note that this Gen 3 part is not compatible with the Glock 21SF Gen 3 model that features an ambidextrous mag release.