The 19-year-old has been named in the Great Britain team for the IPC European Athletics Championships in Grosseto, Italy, which will take place from June 10-16.
The world under-23 200m champion is one of 49 athletes selected by GB for the competition. He is joined in the team by the likes of six-times Paralympic champion David Weir and London 2012 gold medallist Jonnie Peacock.
Arnott, who has limited movement in his left shoulder due to Erbs Palsy, will compete in the T47 100m.
Following the announcement of the team on Tuesday morning, Arnott tweeted: “Happy to say I have been selected to represent Great Britain in the European Championship in Italy. First senior team!”
Great Britain head coach Paula Dunn said: “We have picked a team consisting of vast experience with the likes of Dave (Weir) and Richard (Whitehead) combined with plenty of potential as we look ahead over the next few years including the 2017 World Championships in London and 2020 Paralympics.
“Grosseto will give a number of athletes a chance to leave their mark in the build-up to Rio with others using it as a fantastic opportunity to learn and perform on a major stage.”