User blog comment:Master Sima Yi/Assassinews 03-03-'13 — Assassin's Creed IV: Black Flag trailer and screenshots/@comment-84.48.82.2-20130303180507/@comment-5019018-20130303181434

No problem, anon. :)

If I had to guess, I'd say either a rifle or a magnifying scope. (can't remember the proper name)