ɪn dʒˈɛnɚɹəl, ðɪ ˈɛm nˈaɪntiːn wʌz mᵻkˈænɪkli ɹᵻlˈaɪəbəl, bˌʌt "dɪdnˌɑːt mˈiːt ðɪ ˌoʊvɚɹˈɔːl ɹᵻkwˈaɪɚmənts ʌv ðɪs θˈiəɾɚ" ænd wʌz ɹˈɛlᵻɡˌeɪɾᵻd tə dˈuːɾi ɪnðə ɹˈɪɹ ˈɛɹiəz ʌvðə kˈɑːmbæt zˈoʊn ænd ɪnðə kəmjˌuːnɪkˈeɪʃənz zˈoʊn, wɪððɪ ˈɛm twˈɛnti fˈaɪv bˌiːɪŋ jˈuːzd fɔːɹ fɹˈʌntlaɪn sˈɜːvɪs.
In general, the M19 was mechanically reliable, but "did not meet the overall requirements of this theater" and was relegated to duty in the rear areas of the combat zone and in the Communications Zone, with the M25 being used for frontline service.