Description
The M1 was very similar in construction and appearance to the 155mm Howitzer M1. The only significant difference was its tube of 4.5 inch (114 mm) caliber. The tube had uniform right hand twist, with one turn in 32 calibers. The unbalanced weight of the barrel was supported by two equilibrator springs. The breach was of interrupted screw type; the recoil system hydropneumatic, variable length. The carriage was of split trail type, unsprung and had wheels with pneumatic tires. In firing position, the weapon was supported by a retractable pedestal. The gun was equipped with M12 panoramic sight.
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