More than 100 protestors blockaded Leonardo's Edinburgh plant on Tuesday morning.
Scotland Stop Arming Israel called on the multinational arms company to stop manufacturing parts for F-35s, which they claim have been used by the Israeli Air Force as part of campaigns in Gaza and Iran.
Leonardo UK makes laser targeting systems for the combat aircraft, which is produced by Lockheed Martin.
Protestors waved banners and signs as they took to their positions outside Leonardo's headquarters around 5 AM.
Retired transport worker Kim remarked: "It is truly sickening to know that weapons used in the genocidal onslaught of Gaza and the brutal wars on Iran and Lebanon are made in our backyard in this factory.
"With the political class continuing their unwavering support for the zionist war machine, we all have a duty to take action and disrupt the flow of arms manufactured in the UK."
Tyler, a student added: "While Scotland’s boycott of Israel and the UK’s recognition of a Palestinian state is encouraging, both have been shown to be superficial statements with no subsequent action.
"Recognition without sanctions, embargoes and restitution is not recognition but a veil for ongoing complicity. We demand an end to all arms sales to Israel, from Scotland and across the UK.”
Last July, three people were arrested on terror-related charges after after a van was driven into a fence surrounding the site on Crewe Road in Edinburgh.
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Police confirmed three women, aged 31, 34 and 42, had been arrested in connection with the incident.
More than 100 people blockaded the company's headquarters in January, as part of an ongoing series of protests at the Leonardo UK site.
Speaking on Tuesday, Omar, a 33-year-old teacher, remarked:
"Components for the F-35 fighter jet used by Israel in the ongoing brutal assaults are made in this factory in Edinburgh. When we come together as a community, as people, we can do our bit to stop the zionist war machine."
In response, a Leonardo spokesperson said: "While we respect the right to peaceful protest, the safety and wellbeing of our employees and the local community is our absolute priority.
"Leonardo UK is subject to UK Government export controls and all of our exports are subject to rigorous licensing processes. Leonardo UK does not supply equipment directly to Israel."
