My Account

product categories

Site Information

Fail Zero EXO Nickel Boron AR-15 Bolt Assembly

  • Fail Zero EXO Nickel Boron AR-15 Bolt
  • Fail Zero EXO Nickel Boron AR-15 Bolt - Front View
  • Fail Zero EXO Nickel Boron AR-15 Bolt - Rear View

Fail Zero EXO Nickel Boron AR-15 Bolt Assembly

Product Code:
Calculated at checkout
Out of Stock

Find Similar Products by Category



  • Case Hardened, Shot Peened and MPI (Magnetic Particle Inspected)
  • All components are Mil-Spec


  • EXO Coated Bolt
  • EXO Coated Extractor (fully assembled)
  • Extractor Spring
  • Extractor Pin
  • Ejector
  • Ejector Spring
  • Gas Rings


The bolt of an AR15 should always be of the highest quality possible due to its central role in the functioning of the weapon. Fail Zero designed this EXO nickel boron bolt for both professionals and enthusiasts who cannot tolerate failure from any part of their AR15.

The bolt goes through case hardening and shot peening procedures. They are completed with a magnetic particle inspection phase to ensure that they conform to Fail Zero's rigid specifications. The EXO nickel boron coating provides a robust layer of protection that won't wear away even under the heaviest use. In addition to that, it adds lubricity to the surface, reducing friction and increasing the lifetime of the parts. It also makes cleanup much quicker and easier by preventing the buildup of fouling. You can take off most of the fouling by simply wiping it down with a few patches! Both the bolt and extractor undergo this coating procedure.

Don't settle for any sub-par components in your AR15; get yourself the Fail Zero EXO Nickel Boron Bolt Assembly!

Write Review

  1. great nib bolt 5 Star Review

    Posted by on 9th Mar 2015

    I paired this bolt with a black nitride bolt carrier and it's smooth as silk. I'll be buying another one soon. Functions flawlessly

Back to Top