The self-propelled howitzer (Sigma) was developed in Israel by Elbit Systems.
The development of this system was completed in 2021.
Israeli howitzers were modernized several times in order to improve their capabilities. There were plans to further modernize a total of 250 M109 howitzers in order to extend their service life for another 40 years.
In 2021, a contract was concluded for the export of the Sigma howitzer to an undisclosed country in the Asia-Pacific region, and deliveries are scheduled for completion in 2026.