/ 0 9 - 4 0 ▁( about ▁ 3 0 ▁pieces ); ▁the ▁guns ▁were ▁used ▁in ▁the ▁Cont inu ation ▁War . ▁ ▁Sum mary ▁The ▁M 1 9 0 9 / 3 7 ▁was ▁a ▁relatively ▁minor ▁upgrade ▁of ▁a ▁World ▁War ▁I - era ▁how itzer , ▁which ▁didn ' t ▁address ▁the ▁main ▁fla ws ▁of ▁the ▁latter , ▁namely : ▁ ▁Limited ▁to wing ▁speed ▁due ▁to ▁uns pr ung ▁whe els ▁ ▁Limited ▁elev ation ▁and ▁very ▁small ▁traverse ▁ ▁The ▁short ▁bar rel ▁meant ▁short ▁range , ▁smaller ▁than ▁that ▁of ▁its ▁main ▁advers aries , ▁such ▁as ▁the ▁German ▁ 1 0 . 5 ▁cm ▁le F H ▁ 1 6 ▁( 8 , 9   km ▁vs ▁ 1 0 , 7   km ). ▁ ▁Low ▁m uzz le ▁velocity ▁and ▁small ▁traverse ▁also ▁made ▁the ▁gun ▁hel pl ess ▁against ▁enemy ▁arm or . ▁ ▁Although ▁in ▁ 1 9 4 3 ▁a ▁HE AT ▁shell ▁was ▁developed , ▁the ▁a for ement ioned ▁def ic ien ces ▁meant ▁that ▁a ▁chance ▁of ▁hitting ▁small ▁moving ▁target ▁was ▁sl im . ▁ ▁On ▁the ▁other ▁side , ▁the ▁M 1 9 0 9 / 3 7 ▁was ▁rug ged ▁and ▁reliable . ▁ ▁It ▁was ▁also ▁l ighter ▁than ▁the ▁newer ▁M - 3 0 ▁or ▁the ▁ 1 0 . 5   cm ▁le . F . H . 1 6 . ▁ ▁It ▁was ▁similar ▁in ▁most ▁characteristics ▁to