Manufactured from 4140 steel with a black oxide finish, the Yugo Front Detent Kit includes the detent pin, a spring, and a roll pin. Simply place the spring on the back of the detent pin, insert in the hole located in the front sight base, push in slightly against the spring pressure and tap in the roll pin. The Yugo Front Detent Kit is manufactured here in the U.S.A. and is the perfect addition to the Yugo M92 NightShroud or Yugo M92 NightBrake.