Everyone knows guns, pistols and whatnot are Soldier's best friend. If you don't, ask one. Be prepared to sit tight for hours listening to his or her ramblings, comparing size and stuff like that. Unfortunately some soldiers fail to realize that their second best friend should be a sturdy piece of gear that protects them. For that purpose, Omni-Pol and Omni AF developed special Light Omni-Tek Artillery Tank Armor. Due to material limitations, this tank armor is only manufactured in quality levels 100 to 200. Now, before you go knocking on your supply sergeant's door, all shipments of this armor were stolen, so you can only get it by hunting down various Rubi-Ka dyna bosses.
But since the standard issue can only be worn by Omni-Tek personnel, several groups started to develop ways of enabling it to be worn by any faction. Soon, not one, but two methods were developed which removed the OT restriction. Unfortunately both processes double the run speed handicap.