Relatively new (Hardly used) AR-15 that I built a few years ago. I've maybe put close to 500 rounds through it, never had any issues, only used for target shooting but its just been sitting for a couple years now taking up space. Ive put some better parts into it such as a single stage 3.5 lb drop in trigger, as well as a nitride bolt carrier group, as well as an ambidextrous charging handle wich is great for people with large hands, easier to grab and doesn't get in the way. it's been super reliable, never had any issues, I've only shot Federal 5.56 through it so not sure about other ammunition but it runs flawlessly with Federal. it also has a vortex strikefire 2 red/green dot wich works very well, im impressed with their qaulity and batteries last a long time. it also has dagger defense iron sights. it also has a B5 systems stock as well as a mgpul angled foregrip wich makes it very comfortable to hold for long periods and stability.