Aimo Lahti
...that the self-taught weapon designer Aimo Lahti designed over 50 weapons of all types prior to and during World War II, including the successful Suomi M-31?
...that the self-taught weapon designer <b id="mwBXw"><a href="./Aimo_Lahti" id="mwBX0" rel="mw:WikiLink" title="Aimo Lahti">Aimo Lahti</a></b> designed over 50 weapons of all types prior to and during <a href="./World_War_II" id="mwBX4" rel="mw:WikiLink" title="World War II">World War II</a>, including the successful <a class="mw-redirect" href="./Suomi_M-31_SMG" id="mwBX8" rel="mw:WikiLink" title="Suomi M-31 SMG">Suomi M-31</a>?