M4 (T.Marui) CNC Steel Pin Detent & Spring #141 #142

This 304 stainless steel detent pin are made by precision CNC machines, the spring is made of supreme Japan steel piano wire.  The detent pin is enhanced to tightly securing the pivot pin and takedown pin. The strengthened material provides outstanding durability and reliability.   All items are made for airsoft only.  They are not made for real steel firearms.