Complex sentence: He also built six others mounting the larger 15 cm sFH 13 guns, twelve munitions carrying versions of the Vickers Mk.VI, several munitions carrying versions of the Bren gun carrier and four armoured command tank versions of the Vickers Mk.
Split into simpler sentences: He also built six mounting the larger 15 cm sFH 13 guns. They also created twelve munitions carrying versions of the Vickers Mk.VI, several munitions carrying versions of the Bren gun carrier and four armoured command tank versions of the Vickers Mk.