The X has a larger grip over the plain 43. 10 rounds compared to 6. Nothing between the 2 are compatible.
The 48 is marketed as a compact slim line G19.
It's a 43X with a longer barrel and same 10 rounds. The frames are identical.
The 48 is marketed as a compact slim line G19.
It's a 43X with a longer barrel and same 10 rounds. The frames are identical.