I bought this Olight TC15/TC10 a few months ago and so far its really cool. It has both barrels included to use either a AA battery or the cr123. Its a really nice polished titanium. It also gives the ability to carry a spare battery in the extra barrel tube that you aren’t using at that time, it comes with end caps to enclose the spare battery, Also check out my youtube channel in the link below, subscribe to my channel for notifications of the free giveaways I will be doing.