FailZero AR15 Full-Mass Bolt Carrier Group in Black | AR BCG

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Your Price: $99.49
Retail Price:$109.99
You Save:$10.50(10%)
Fail Zero full-mass bolt carrier group finished in Black Nitride for 5.56 & .223 AR rifle builds. This AR bcg comes fully assembled and ready to drop in your home AR build or to upgrade an older bcg from one of your other rifles. All critical parts are Black salt bath nitride finished to give you more durability and provide increased corrosion and wear resistance. BCG's are a good gun part to have an extra one on hand, especially if you have multiple rifles, this one provides great reliability at a great price.
Part Number: FZFBCG-BLK
Availability: In Stock.
Fail Zero full-mass bolt carrier group finished in Black Nitride for 5.56 & .223 AR rifle builds.  This AR bcg comes fully assembled and ready to drop in your home AR build or to upgrade an older bcg from one of your other rifles.  All critical parts are Black salt bath nitride finished to give you more durability and provide increased corrosion and wear resistance.  BCG's are a good gun part to have an extra one on hand, especially if you have multiple rifles, this one provides great reliability at a great price.

FailZero AR Full-Auto Bolt Carrier Group in Black Features:



  • Comes fully assembled & Ready to install
  • Drop-In to most Mil-Spec M16, M4, and AR15 upper receivers
  • Following parts are Black Nitride treated:
    • Bolt
    • Extractor
    • Bolt Carrier
    • Cam Pin
    • Carrier Key
  • Firing pin has the normal chrome finish
  • Black salt bath nitride finish provides the following:
    • Improved durability
    • Increased wear resistance
    • Increased corrosion resistance
  • Full-Mass bolt carrier group so it works with Full-Auto rifles