M1919A4 Caliber:7.62mm. (cal.30) Length:1041mm. Barrel length:610mm Weight:14.060 kg. Initial projectile speed:854 m/s. Rate of fire:400-500 rounds/min. Power supply:250 cartridge tape. M1919A6 Caliber:7.62 mm. Length:1,346mm. Barrel length:610mm Weight:14.740 kg. Initial projectile spee