Featuring triple sensor technology including a compass, barometer and altimeter, it's no surprise the Rangeman GW9400 is one of the most popular "Master of G" G-SHOCK watches released. I picked up a this Army Green variant in early 2019 brand new to swap modules with a 9400-1.
The standard GW9400-3 as delivered:
The module swap underway
The end product. Bullbars, a black replacement strap and positive module installed.