I have Kingpins on each my rifles and can continue on to purchase extra as my collection grows. I do desire; nonetheless, that the black pins came with a black spring to match however it is perfect just a similar. five/five for me! Great task fellas at AR MAGLOCK and https://kylerwmymx.theobloggers.com/39206900/the-fact-about-t-square-that-no-one-is-suggesting