It has no problems and functions perfectly. It has polymer externals with full metal internals. The reason for sell is that I was given a krytac for my birthday soon after I purchased the ssr4. So, I no longer have a need for the ssr4. I only used it once to test if was functional. It comes with everything in the box. Such as the gun, mag, barrel cleaner, flash hider, and manual. If wanted, I have custom 3D printed a integrated suppressor for the rifle. It doesn't come with a battery or any external attachments, expect the suppressor if requested. The item is listed on eBay too. https://www.ebay.com/itm/284987200028?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=Vh6kgbzuRAq&sssrc=2051273&ssuid=Vh6kgbzuRAq&var=&widget_ver=artemis&media=COPY