撃うち出だす

godan verb (-su), transitive verb

begin shooting; open fire

Focuses on the start of shooting, often in a military or action context.

• 敵てきに向むかって一いっ斉せいに撃うち出だした。

  They opened fire on the enemy all at once.

godan verb (-su), transitive verb

shoot out; fire out

Emphasizes the projectile being discharged, not necessarily the beginning of shooting.

• 大たい砲ほうが砲ほう弾だんを撃うち出だす。

  The cannon fires out a shell.