Remotely-operated sniper rifles and machines guns are becoming a powerful weapon for rebel groups in Iraq and Syria — including the Islamic State — allowing fighters to kill with the ease of pressing a button.

The remote-controlled guns — common in the U.S. military — are being adopted by the Free Syrian Army, Shia militias and Kurdish fighters in Iraq as well as jihadist groups, like ISIS, the blog WarIsBoring.com reported.

According to the blog — which cites an August report by the U.S. Army’s Foreign Military Studies Office — there are 20 distinct teleoperated weapons spotted in Iraq and Syria that can be traced to specific armed factions.

Such guns are used by militaries around the world in countries like Israel and South Korea. The U.S., which has thousands mounted on tanks and vehicles, is testing out a new machine-gun robot called MAARS, the blog reported.