For the last couple of years i have been using copper anti-sieze on the threads of all my rifles and cannot fault its performance.
It doesnt seem to attract dirt/debri and seems to stay put, but more importantly it prevents the dreaded moderator stuck on syndrome which can afflict those of us whose maintenance regime is maybe not as regular as we would like it to be.
[Taken from side of tin]
It is a lead free compound for threaded connections of pipes flanges and threaded fasteners subjected to high temperature and/or corrosive environments. The compound overcomes galling on assembly,prevents seizure and reduces dismantling torque.
Temperature range as an anti-seize is -30*c to 1100*c
Available at most hardware stores or machinery centres it shouldnt cost the earth and a tin should last most of us a lifetime
Give it a go i dodnt think you will be dissapointed just remember a little dab will do ya.
Hope this prevents you getting it stuck
RICK O SHEA