HELP.. Gladius

Hello . New to the sight. How the heck do you get the barrel shroud off the Gladius. Is it threaded or pressed on? I have tried with the barrel nut off and on. Tring to fix clipping on my Donnyfl suppressor. The shroud seems "flexable" also thinking the suppressor is to long and disrupting the up swing of the pellet . All iAll need to remove the Shroud... Hatsan has been no help... does not respond to emails..