While it often mounted a cowl MG 17 firing through the prop, the famed Luftwaffe Arado Ar 96 trainer typically had no provision for a rear gunner or a lateral or rearward firing MG. However at least three prototypes, the V7, V8 and V9 featured a rear cockpit and canopy modified for gunnery training. Here is a rare view of the Arado Ar 96 V8 D-IXWP (WNr. 2074) with its cut away rear gunner's compartment. Below is the V9 WNr. 2075. It is believed that these variants were built for export and that the V9 may have gone to Bulgaria although its ultimate fate is unknown. (via Michel Ledet and
Avions magazine)