Tech Smith has made a new AFG MAX for Pre 2018 TP9, does not work on the TP9-N. T
The Pistol AFG has a FIN on it blocking the user from Gripping (Placing one's hand & thumb wrapped around the AFG).
The TP9 AFG MAX Pre 2019 version is a bolt on, replacing the picatinny rail that is installed on the pistol.
Worth it if you don't want to blow your thumb off. 3d printed fyi, but still looks good and matches the aesthetic. Color and texture match about 93% if that matters to you. Get long allen keys for installation.