Spike's Tactical M16 Bolt Carrier Group Lightweight Nickel Boron
Nickel boron nitride anti-friction process applied to the barrel. NBN is better than polishing, better than Teflon, does not add dimensionality and cannot flake off. I did the hammer and trigger bar
Rifleman Q & A: Why Nickel Boron? | An Official Journal Of The NRA
Electroless nickel-boron plating - Wikipedia
Nickel Boron Coating at best price in Mumbai | ID: 5116147997