FailZero Nickel Boron Bolt Carrier Group – AR-15 Semi Auto Cut

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AT3™ Upper Receiver and SPEAR Handguard Combo

AT3™ Upper Receiver and SPEAR Handguard Combo - Black - 15 inch


AT3™ Upper Receiver and SPEAR Handguard Combo

AT3™ AR 15 Upper Receiver and SPEAR Handguard Combo

AR-15 Cut Bolt Carrier Group

All critical parts are treated with EXO Technology, a revolutionary surface technology that provides permanent dry lubricity, radically improves the performance of your AR-15 and eliminates the need to apply oil or grease to treated parts for the life of the weapon. This BCG has a matte finish, and an AR-15/Semi Auto only profile.

Coated parts include:

  • Bolt
  • Bolt Carrier
  • Extractor
  • Cam Pin
  • Carrier Key
  • Firing Pin


  • Complete semi-auto Bolt/Carrier Group without the hammer; All you need all in
  • Kit comes fully assembled and ready to drop into any mil-spec AR-15 upper receiver; Pre-assembled, ready to install


  • Finish: EXO Technology Matte Nickel Boron
  • Profile: AR-15/Semi-Auto Only Cut

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

FailZero Limited Lifetime Warranty

  • The FailZero warranty covers products of UCT Coatings, Inc. for the failure of the EXO surface against chipping, peeling, or wear through that prevents the weapon from functioning or for the failure of the part.
  • The warranty is of unlimited duration. UCT will recoat the product free of charge including return shipping costs.
  • This warranty does not cover customer abuse at any time.
  • UCT Coatings, Inc. shall not be responsible in any manner whatsoever for malfunctioning of the firearm, or for physical injury or property damage, resulting in whole or in part from:
  1. Criminal or negligent discharge
  2. Improper or careless handling
  3. Unauthorized modifications
  4. Defective, improperly hand-loaded, or reloaded ammunition
  5. Neglect
  6. Other influences beyond our direct and immediate control.
  • This limitation applies regardless of whether liability is asserted on the basis of contract, negligence, or strict liability (including any failure to warn).
  • Under no circumstances shall UCT Coatings, Inc. be liable for incidental or consequential damages, such as loss of use of property, commercial loss, and loss of earnings or profits.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 1 review

easy install, put in day received it and shot the next day 500 rds. no problem. clean up was faster than before.