I thought you might be interested in looking at Challenge stuck at 8 of 10 kills with rifle.
https://forums.bohemia.net/forums/topic/227638-challenge-stuck-at-8-of-10-kills-with-rifle/?do=findComment&comment=3394873
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.