Rival Arms Magazine Release for Glock Glock 42 Black RA. Single piece construction for easier install and less maintenance. Includes new mag release spring. No gunsmith required. Limited lifetime warranty Specifications for Rival Arms Magazine Release for Glock: Manufacturer: Rival Arms Gun Make: Glock Condition: New Country of Origin: USA Package Contents: Rival Arms Magazine Release for Glock What firearm models does the manufacturer say Rival Arms Magazine Release for Glock is compatible with? The manufacturer says that Rival Arms Magazine Release for Glock is compatible with Glock 42 Glock 43X Glock 48 Glock 43 Glock 44Rival Arms RA-RA72G005A: Magazine Release for Glock Glock 42 Black