Soldiers with 2nd Cavalry Regiment fire M777 155mm Lightweight Field Howitzer during a combined arms live fire training exercise at the Estonian Defense Forces central training area in Estonia. M777 is the world’s first 155mm Howitzer weighing less than 10,000 lbs (4,218 kg).
![](http://www.aiirsource.com/wp/wp-content/uploads/2016/06/m777-155mm-lightweight-field-how-1280x768.jpg)