Hey guys,I live in southeast Alaska and Ive had my M1 supa 90 and my M4 in a corner of a room that has both windows open. It rains here all the time so theres plenty of moisture around. I lightly oil my barrel and wipe it dry after every shooting session. You know Ive never seen any RUST! Wow are these like anti rust barrels or something? Thank you Benelli.