▁vertical , ▁but ▁it ▁consisted ▁of ▁two ▁pl ates ▁that ▁strength ened ▁it ▁when ▁compared ▁to ▁a ▁simple ▁hom ogeneous ▁steel ▁plate . ▁ ▁The ▁vehicle ▁had ▁its ▁crew ▁compart ment ▁and ▁drive ▁section ▁forward , ▁in ▁a ▁large ▁and ▁low ▁cas em ate ; ▁the ▁engine ▁was ▁situated ▁behind ▁it , ▁in ▁a ▁separate ▁structure ▁( typ ical ▁of ▁Italian ▁designs ), ▁which ▁was ▁s loped ▁and ▁somewhat ▁smaller , ▁and ▁had ▁ins pection ▁pan els ▁on ▁the ▁roof . ▁The ▁ch ass is ▁was ▁identical ▁to ▁that ▁of ▁M 1 3 / 4 0 ▁t anks , ▁with ▁eight ▁small ▁whe els ▁in ▁four ▁t rolle ys ▁which ▁were ▁joined ▁in ▁pairs ▁by ▁two ▁arms . ▁Sus p ensions ▁were ▁of ▁the ▁leaf ▁spring ▁type , ▁which ▁was ▁reliable ▁but ▁didn ' t ▁allow ▁for ▁high ▁spe eds . ▁The ▁transmission ▁was ▁located ▁in ▁the ▁forward ▁part ▁of ▁the ▁vehicle , ▁and ▁the ▁crew ▁consisted ▁of ▁only ▁three ▁members : ▁driver , ▁loader / radio ▁operator , ▁and ▁tank ▁commander / gun ner . ▁ ▁The ▁main ▁gun ▁was ▁a ▁derivative ▁of ▁a ▁ 7 5   mm ▁L / 1 8 ▁gun , ▁itself ▁a ▁quite ▁modern ▁divis ional ▁art illery ▁piece . ▁It ▁was ▁ 1 8 ▁cal ib ers ▁long , ▁with ▁ 4 0 ° ▁traverse ▁and ▁− 1 2 / + 2 2 ° ▁elev ation . ▁The ▁gun ▁had ▁a ▁m uzz le ▁bra ke , ▁and ▁there ▁were ▁several ▁observation ▁and ▁aim ing ▁systems