Following local experiments with spaced and slat armour on T-72AVs and BMP-2s, the 4th Armoured Division initiated a small-scale upgrade programme for its armour in the summer of 2014. After upgrading several of its T-72M1s and bulldozers with
additional armour, the 4th Armoured Division is now also operating at least
one ZSU-23-4 self-propelled anti-aircraft gun (SPAAG) upgraded in the
same fashion.