Men are more likely to own a firearm then woman (in America).

White men are especially likely to be gun owners: About half (48%) say they own a gun, compared with about a quarter of white women and nonwhite men (24% each) and 16% of nonwhite women.

And firearms account for more then half of all suicides.

White males accounted for 68.46% of suicide deaths in 2022. In 2022, firearms accounted for 54.64% of all suicide deaths.

However, it's very likely that twice as many woman make attempts then men.

Based on the most recent Youth Risk Behaviors Survey from 2021 (most recent results), 10.0% of youth in grades 9-12 reported that they had made at least one suicide attempt in the past 12 months. Female students attempted 1.86 times as often as male students (13% vs. 7%). American Indian or Alaska Native students reported the highest rate of attempt (16%) with white students at 9%. Approximately 3% of all students reported making a suicide attempt that required treatment by a doctor or nurse.

So, men, to put it coldly are more efficient at the task, thanks to their more likely access to more effective methods.