OVERVIEW: Parallax Tactical’s New Titanium Nitride Hard Coated Nickel Boron BCG

Posted by rick cancino on Jan 7, 2014 in Articles, New Products | Comments Off on OVERVIEW: Parallax Tactical’s New Titanium Nitride Hard Coated Nickel Boron BCG

I have been looking forward to Parallax’s TiN (Titanium Nitride) Coated BCG (Bolt Carrier Group) for a while now, and we all know good things come to those who wait.
The BCG is first coated with Nickel Boron that is known for its natural lubricity but then gets treated to additional hardness from the Titanium Nitride. Nickel Boron on it’s own has a hardness of 68-72 Rc and a low coefficient of friction (.04).

The carrier is the only component that gets coated in TiN over the NiB.

Parallax first has the Nickel Boron carrier polished before getting it sent out to get coated with TiN. In addition to its beautiful gold color, TiN gives the Bolt Carrier Group one of the hardest surfaces possible. Titanium Nitride pushes the hardness level above Rockwell C hardness of 88. The Rockwell C rating system tops out at 80 so the Vicker’s hardness system was also used to evaluate the TiN coating. The TiN coating received a rating of 2400 even tho the Vicker’s test only goes up to 1800. Thanks to this additional strength gained from TiN, manufacturers have used it on saw blades and drill bits to get the most life and sharpness out of them. Drill bits coated with TiN will last 3x longer than those that were un coated.