Geissele Automatics AR-15 Bolt Carrier Group Reliability Enhancement Kit - H1

Manufactured by Geissele Automatics
SKU: 05-492-H1
MPN: 05-492-H1
Manufactured by Geissele Automatics
1 Review

In Stock

Orders of non-FFL items will ship same day if ordered before 3:30pm CST (M-F). FFL orders will ship within 5 business days if transfer details are provided.

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The Geissele Automatics Reliability Enhancement kit comes with the enhanced 5.56 BCG, Super 42 braided buffer spring, and H1 buffer weight. The Enhanced Bolt Carrier Group is a full mass M16 profile full auto rated BCG built out of premium materials and coatings for long term durability and reliability. The carrier is machined from 8620 steel and the cam pin is machined from H13 steel. The entire AR-15 Bolt Carrier Group is coated in Nanoweapon which is a Chrome-Nitride finish that increases smoothness and surface hardness for corrosion resistance and cleaning. The carrier also features longer upper rails to prevent carrier tilt and increase feeding reliability. The bolt is forged from Carpenter 158 steel and undergoes a proprietary heat-treating process that reduces impurities and makes it stronger and more consistent than other C158 bolts. Additionally, each bolt undergoes high pressure testing, magnetic particle inspection, and a rigorous inspection process. If you are looking for an AR-15 5.56 Bolt Carrier Group that will last a lifetime, you can’t go wrong with the Geissele Automatics Enhanced BCG.

  • Full auto rated
  • M16 Profile
  • 8620 Carrier
  • C158 Bolt
  • H13 steel cam pin
  • Improved upper rails
  • Nanoweapon Chrome Nitride finish
  • HOT and MPI
  • Includes Super 42 braided spring and H1 buffer

Geissele Automatics manufactures confidence, offering quality triggers and components for the warfighter and competitor. They were established in 2004 with the mission to build the highest quality, reliable triggers for competition and their first trigger, the Hi-Speed National Match trigger, was so popular that they were asked by the Department of Defense to produce a select-fire trigger for the United States Special Operations. Again, it was a success and Geissele decided to bring a semi-automatic version to the civilian market for law enforcement and personal protection.
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Bolt FinishNanoweapon - Chrome Nitride
Bolt MaterialCarpenter 158 Steel
BrandGeissele Automatics
Caliber Gauge5.56 NATO
Carrier FinishNanoweapon - Chrome Nitride
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

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Reliable bolt.

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The best money can buy.