Open Box – Geissele Automatics 5.56 Reliability Enhanced Bolt Carrier Group

Used/Open Box Item: This product is not eligible for return. Click to learn more about used products.

Original price was: $365.00.Current price is: $326.15.


Product Summary

The Reliability Enhanced Bolt Carrier Group is a 5.56mm full-mass, full-auto rated M16/M4 bolt carrier group manufactured in Geissele’s state-of-the-art manufacturing facility in North Wales, PA.

  • Features a forged bolt manipulates the grain structure of the metal and yields a bolt capable of 5 times the life of a mil-spec bolt.
  • M16 cut carrier
  • Carrier Material: 8620 Steel
  • Bolt Material: Carpenter 158
  • Finish: Nanoweapon (Chrome-Nitride)
  • Caliber: 5.56mm
  • Maximum corrosion and wear resistance.
  • Each bolt is then rigorously inspected.
  • The carrier features a properly torqued and staked, chrome-lined, gas key.


Technical Information

Color / Pattern


8620 Steel


5.56 NATO / .223 Remington

Firearm Compatibility


Chromium Nitride

Catalog Location

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 visit