A Royal Marine serving on board a British ship docked in Dubai shot himself while on sentry duty, an inquest has heard.
James Holloway was found dead on the bridge of the Fort Rosalie on 30 October, 2017 from a single gunshot wound to the head from his Heckler and Koch assault rifle.
An inquest in his home county of Lincolnshire this week heard the 25-year-old was on his first overseas deployment.
He was said to have appeared "withdrawn" and "not his normal self", BBC News reported.
Holloway's relationship with his girlfriend had recently broken down, the assistant coroner Richard Marshall said, concluding his investigation into the 25-year-old's death.
His mother, Amanda Gray, claimed the Royal Navy had "failed in their duty of care" by allowing the marine access to live ammunition, and said more mental health support is needed in the armed forces.
"There is still a culture of servicemen not showing weakness for fear it might end their careers, and this needs to change," she said.
Mr Marshall said he had not found the navy or marines at fault in any way.
