Can't find the answer on google. Anybody know if the Fobus GL4 holster, design for the G29/G30 with fit a G20/G21? I was under the impression by other holster makers that if the muzzle end is open, G20/G21 and G29/G30 holster are interchangeable. I just want to know because I'm planning on getting a G20 and want to know if my GL4 will fit!

Fobus makes the GL3 to fit the G20/G21, but I wasn't sure why. Maybe it's just longer to cover the entire frame? I know with the GL4, some of the frame and slide would stick out past the end of the holster if fitted with a G20/G21.