Glock Gen 4 Reversible Magazine Catch for G42/G43 Black

Glock Gen 4 Reversible Magazine Catch Not G42/43 Black. The manufacturer says that Glock Gen 4 Reversible Magazine Catch Not G42/43 is compatible with Glock 42 Glock 43Glock GLSP07534: Gen 4 Reversible Magazine Catch Not G42/43 Black