Add that extra little bit of flair to your next AR-15 build. The 4140, .250" diameter hardened steel construction will ensure they will never fail, and they are designed to work with any mil-spec lower receiver. The familiar Noveske Iron Cross is machined directly into the head of each pin. These steel pins feature a nitride finish and are a direct drop-in replacement for the factory rear takedown and front pivot on your AR-15. These are an easy way to freshen up the look of your rifle!