Almost every part of the AR rifle has been improved since its adoption by the military in 1964. Yet most companies still use a process first developed in the 1869 to finish their Bolt Carrier Groups (BCG). It is time to use a plating that is just as advanced as the rest of your rifle. ROBAR is now offering Mil-Spec Bolt Carrier Groups with the choice of NP3 or NP3 Plus. All parts are machined, heat treated & finished to US mil-specs and tolerances. The bolts are shot-peened, heat treated, and 100% Magnetic Particle Inspected per US mil-spec.

Advantages of NP3 on your Bolt Carrier Group

NP3 is a surface treatment for steel and metal alloys that combines sub-micron particles of PTFE (polytetrafluoroethylene), otherwise known as Teflon, with electroless nickel.


  • Increases reliability because it requires little to no oil for lubrication, although we recommend using some oil.
  • Very accurate and even coatings on all activated surfaces.
  • Cleaning is minimal
  • Permits firing for longer periods of time between cleaning, as dirt and powder residue has no wet or oily surface to cling to.
  • NP3 has a micro hardness of 48-51 Rockwell as plated (nickel matrix).
  • NP3 is very corrosion resistant, a 1 mil (.001) coating exceeding a 250 hour salt spray test.
  • NP3 has a high lubricity and low friction co-efficient; therefore, the life expectancy of a firearm will be greatly increased due to reduced friction wear.
  • The coating is strippable with no effect on the base metal, allowing other coatings to be applied or a new coating of NP3 to be applied, if necessary.
  • NP3 plated onto stainless steel guns will prevent galling, a problem common with stainless steel.
  • NP3 is a satin gray, non-reflective color ideal for all firearms.
  • NP3 can be plated to all internal parts giving a smoothness to the action not found with any other coating.
  • In cases where the NP3 has been perforated, the corrosion shows no tendency to spread or migrate under the coating.
  • NP3 is guaranteed against corrosion, peeling or flaking for the lifetime of the firearm.

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