I've examine like a damaging however, the finish is just not perfect for a $400 trigger and I think it dependant on shots. Then also some do complain they don't work correct - suspect it is connected to non spec bolt carriers (numerous AR's on the market include versions, Rugers https://rarebreedtriggerupgrade57890.link4blogs.com/55953100/the-ultimate-guide-to-rare-breed-triggers-website