Complex sentence: To correct shortcomings of the 82-mm mortar Model 1941 it was modernised during initial production; the construction of the bipod, wheel and fastening of the sight was changed.
Split into simpler sentences: To correct shortcomings of the 82-mm mortar Model 1941 it was modernised during initial production. In the course of production the construction of bipod, wheel and fastening of the sight was changed.