I've study to be a damaging nevertheless, the finish isn't really perfect for a $four hundred trigger and I believe it determined by shots. Then also some do complain they don't work proper - suspect it is actually linked to non spec bolt carriers (numerous AR's available come with versions, https://finnqlauq.develop-blog.com/41834843/considerations-to-know-about-rare-breed-frt-15-trigger-for-sale