I have study like a unfavorable though, the end isn't great for a $four hundred trigger and I think it depending on pics. Then also some do complain they don't work proper - suspect it is actually linked to non spec bolt carriers (many AR's on the market feature variants, https://rarebreedtriggerupgrade92863.losblogos.com/33800867/a-simple-key-for-buy-rare-breed-trigger-unveiled