This is a 1/48 resin kit from Gaso.Line from France. The recoil leg at the back is scratchbuilt. i used a penny,paperclip that was straightened out,and a sprue runner. A craft bead was put into a squarish plastic on the penny.
The kit came with a longer 88mm barrel. I used a 75mm 1/35 barrel from a Tamiya M3 lee kit. In 1/48 it scales out around 105mm.