Here is the list of Stock KDZ firmware for LG G Stylo (aka LG G4 Stylus).
The LG H630 is a LG G Stylo variant which was released as LG G4 Stylus in Global market.
T-Mobile G Stylo H631 KDZ Firmware:
Android L 5.1.1 KDZ H631v10i
Android L 5.1.1 H631v10j
Android M 6.0 H63120b
MetroPCS G Stylo MS631 KDZ Firmware:
Android L 5.11 MS631v10i
Android L 5.1.1 MS631v10j
LG G4 Stylus H630
So far, we can not find the KDZ firmware for Cricket G Stylo H634 and Sprint G Stylo LS770.