LMT Defense 5.56 Enhanced Full Auto Bolt Carrier Group

LMT Defense
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(1 review)
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If our standard bolt carrier group is the infantryman of the gun industry, then our enhanced BCG is the delta operator.  This carrier group was designed to function effectively in full-auto, suppressed, and short barrel weapon systems, and it is made of materials far more durable than your standard fare.  Quite simply, it’s the best possible upgrade for your rifle to increase reliability and functionality.

Behold the laundry list of enhancements our design brings to the table:


  • Altered cam path for longer dwell time and more robust extraction
  • Modified gas hole improves gas flow across the bolt’s tail
  • Additional gas ports on right side and modified orientation to improve gas flowing through the ejection port, and not into your face
  • Relief grooves added to the top and bottom to channel debris and maintain fluid movement


  • Built from a proprietary material that is not only stronger than the standard bolt but easier to clean as well
  • Modified locking lugs provide flexibility and durability in dealing with high-pressure, overgassed loads
  • “Lobster tail” extractor utilizes two springs to allow stronger and more consistent extraction with drastically improved spring life


  • 5
    Best bolt on the planet

    Posted by GuerrillaKilla on Jan 17th 2023

    Made from AreMet 100 material, it is the most durable and resilient bolt ever manufactured! Everything else in your AR platform will FAIL under energetic stress before this bolt even shows signs of ware! The tail hook on fighter jets used for landing on aircraft carriers is made of AreMet 100. Let that sink in for a moment! We're talking lots of energy and stress being absorbed by those applications! What will LMT think of next! I'd also like to thank all of the guys at BOSS that help make life wonderful by what they do!!