Based on Bronco kit of the 7.62cm FK36(r) auf PzJgr Selbstfahrlafette Zugkraftwagen 5t and Panda 15 cm sFH 13/1(Sf) auf GW Lr.s.(f) Sd.Kfz. 135/1, Oak Model has added several improvements like metal barrel, 3D printed items and A3 sized printed boxart.