RECOIL Magazine has an information regarding a new version of G43 called G43X. It features longer grip to accommodate 10 rounds instead of current 6
The graphic is what RECOIL Magazine made based on their information.
EDIT: Glock 48
RECOIL magazine once again has an article about new Glock. It supposedly has 10 round capacity, and is a single-stack pistol about the size of a Glock 19.
From: RECOIL Magazine