He also launched an online challenge to raise awareness of the risk of suicide among former service personnel.
'Calories for Casualties' sees participants burn 71 calories, the same number of veterans and active military personnel who took their own life in 2018, through any kind of exercise.
They then need to nominate five friends to do the same.
Many celebrities and service personnel have taken part, including Rick Stevens, a contestant from 'SAS: Are You Tough Enough', Olympian and Army officer Heather Stanning and soldiers from 2 and 5 SCOTS take part.
Mr McAusland has had first-hand experience of the help The Samaritans can offer after dealing with his own mental health issues.
He decided to include Combat Stress in his fundraising after speaking to friends in the Army and finding out how those who have served can struggle.
He says the whole concept of having to "man up" is "just rubbish, basically":
"I think the more time we spend talking about what's going on in our head and the more time that we spend being vulnerable, we allow other people to be vulnerable and we can ultimately save and change people's lives."