Maple Ridge Armoury

Enhanced Nib Bolt Assembly

  • Sale
  • Regular price $99.99


The Maple Ridge Armoury Enhanced Bolt Assembly is a precision machined, US MilSpec bolt for the AR-15, M16, M4 series semi-automatic firearm.  All bolts are ground after heat treatment and then MPI tested as part of our strict quality control.  Our Enhanced bolt assembly is nitro-carburized, cryogenically stress relieved and plated with Nickel Boron (NiB) providing excellent corrosion resistance, wear resistance, hardness , and lubricity.  The bolt face is chamfered to assist with engagement with the cartridge and along with the rubber extractor insert assist in ejection of the spent case.

  • Caliber: .223/5.56×45/300 AAC caliber
  • Material: 9310 Steel
  • Treatment: Nitro-Carburized and Cryogenically Stress Relieved
  • Finish:  Nickel Boron Plated
  • Ground after heat treat
  • MPI tested
  • Chamfered bolt face
  • Rubber insert inside extractor spring
  • Made in Canada