I've browse as being a destructive although, the finish just isn't great for a $400 trigger and I think it based upon images. Then also some do complain they do not work ideal - suspect it truly is linked to non spec bolt carriers (many AR's around have versions, Rugers https://rare-breed-trigger-frt-1567899.blogofoto.com/65890974/getting-my-rare-breed-trigger-3-position-to-work