I've Kingpins on both my rifles and will keep on to obtain much more as my assortment grows. I do wish; however, the black pins came by using a black spring to match however it is ideal just the exact same. five/5 for me! Great work men at AR MAGLOCK https://manueludkqx.ziblogs.com/33085868/indicators-on-magnetic-lock-pin-you-should-know