The Israeli company Elbit Systems developed a new generation of 155mm SIGMA wheeled self-propelled howitzers to replace the M109 crawler self-propelled howitzers currently in service with the Israeli armed forces.
Today, with the advantage of being lighter and easier to deploy by rapid response units using military transport aircraft, self-propelled howitzers have become very popular with the militaries of many countries including Indian, China and Russia.
The wheeled artillery gun also has high strategic maneuverability and simplifies logistics due to less dependence on heavy transport vehicles. Like many militaries around the world, Israel wants to replace its crawler self-propelled howitzers with wheeled self-propelled howitzers.
The US Army has also launched a search to equip a new mobile artillery system for brigades equipped with Stryker wheeled armored vehicles, which are currently armed with the 155 mm M777 towed vehicle cannon. The Israeli company Elbit Systems with its 155mm Truck Mounted Artillery System (ATMOS) is one of the candidates for this program of the US Army.
In May 2019, the Government of Israel announced a $125 million contract under a planned 12-year, $280 million program to replace the M109 crawler self-propelled howitzer in service of the Israeli armed forces.