The phrase "propaganda instrument" is correct and usable in written English.
You can use it to refer to a tool, such as the media, used to spread a certain opinion. For example: "The government has utilized the media as a powerful propaganda instrument to spread its message."
Ria Novosti, a state-news agency, which sheltered loyal but liberal-minded journalists, was purged and turned into a blunt propaganda instrument.
The party was not only a permanent means of contact between the people and party leaders but also a propaganda instrument.
At age 6, Elian clearly cannot fully comprehend the issues swirling about him, and using him as a propaganda instrument is offensive.
Emphasis on the personality of the emperor (extended sometimes to empresses, sons, or deceased members of the imperial house) was a powerful propaganda instrument in a coinage that circulated throughout a vast empire.
The station's editors say their detour into American news coverage is no cold-war-style propaganda instrument, but rather an effort to improve ratings for the channel to better tell stories about Russia.
And to a significant extent, Radio Liberty, which for a long time was a journalistic organisation, has become a propaganda instrument," Babitsky claimed in an interview in Donetsk recently.
Those in Brussels who strive to promote the Union know that EU-financed programmes are among their most effective propaganda instruments.
Against the extensive propaganda instruments available to Mr. Putin's authoritarian regime, the West can promote a fair and factual version of events, but there's little it can do to make ordinary Russians believe it.
Cameron's intervention came as EU ministers prepare to press the social media industry – providers such as Google, Facebook, and Twitter – to cooperate in preventing jihadists and terrorists using the internet as recruiting sergeants and propaganda instruments inciting hatred and violence.
"In wartime it was an instrument of propaganda, let's face it.
