Guns三式十三粍固定機銃三式十三粍固定機銃三式十三粍固定機銃Caliber13.2 mmService193119321933193419351936193719381939194019411942194319441945Japan · Pacific≈ Apr 1944 – Aug 1945Aircraft 3193119321933193419351936193719381939194019411942194319441945A6M5b Model 52 Otsu≈ Apr 1944 – Aug 1945A6M5c Model 52 Hei≈ Oct 1944 – Aug 1945A6M7 Model 62≈ May 1945 – Aug 1945