Are there any gap fillers for P-09 mags in P-07's?

What is out there to extend P-09 mag capacity to 140mm?

170mm?

Round count in 9mm for each?

FWIW, CZ USA has 2 round extensions for them, bringing the P09 mag to 21 rounds

CZ custom makes base pads for 140mm, I believe it is 22 round capacity with stock internals and either 24 or 26 with cz custom interals, can't remember on that part exactly.

eta just looked it up, 24 capacity with cz custom internals  cz custom 140mm base pad

Any here with direct experience on these extensions. I am guessing GTG but would be happy to hear some comments.

Yeah, I purchase a few to try them out.  They fit solid and look good...no issues with feeding.  The big issue is that they include a very flat follower...it won't lock the slide back on my P09; none of them.  It's a little disappointing, and not something I'm willing to do without.  I put the original followers back in so it only holds 22 rounds vice the 24 you get with the flat follower.  $38 for three extra rounds is not the best investment if you want the magazine to function like the OEM.  Quality aside, I'm disappointed in the capacity for actual use.  Now, if you don't mine the slide not locking back, you'll get the full 24 rounds in the extensions.

ROCK6

Thanks for taking time to comment!