This is NOT a thread about red dot sights, LPVOs, stocks, sling, tactical lights or other stuff attached to a weapon (exceptions noted below), nor is it about holsters, chest rigs, plate carriers or gear of that nature.

This thread is about all the little peripheral stuff that has either helped you become a better shooter or has just made your life a lot easier having it around. Those things you wonder how you got by without it before had it. Stuff like shot timers, laser range finders, a quality spotting scope, some fancy mag loader that fills a 100 mags in 20 minutes, that sort of stuff. As far as something attached to a weapon, say like a GoPro for self analyzing your drills would be in line with the topic.

Let's hear what you got, how you use it and why you consider it an important part your shooting/training lifestyle.