Ordnance QF 2 Pounder created by Robboposh taken from 3D warehouse converted to STL using & re-scaled to approx. 1/100 scale i.e.15mm for Flames of War etc.
http://www.meshconvert.com/
https://3dwarehouse.sketchup.com/model/3b95b6e8afb151d152be1f5910e33df/Ordnance-QF-2-Pounder