Sturmpanzer

The Sturmpanzer or Brummbär  was a German assault tank built on a basis of a Panzer IV. An armored casemate housed a short-barreled 15 cm howitzer. It first saw combat at Kursk (1943) where demonstrated its effectiveness and was used troughout the rest of the war in several fonts.
This is an Easy Model 1/72 Brummbär.