Microbest Full-Auto M16 Bolt Carrier Group, Phosphate & Chrome-Lined

$110.00

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Assembled with Sprinco springs and inserts for longevity and reliability

(5 customer reviews)

254 in stock

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Microbest Full-Auto M16 Bolt Carrier Group, Phosphate & Chrome-Lined

The Microbest Bolt Carrier Group is the measuring stick by which all others are compared.

Microbest is the OEM manufacturer and supplier of bolt carrier groups for a lot of popular rifle manufacturers, including but not limited to, Bravo Company Mfg and Sons of Liberty. Microbest is trusted to build a bolt carrier group that exceeds the MIL requirements from the right materials and processes with great attention to detail.

Assembled with Sprinco springs and inserts for longevity and reliability.

Specifications:

Bolt Assembly:

  • Bolt precision machined from Carpenter 158 alloy and vibratory tumbled
  • Heat-treated and shot-peened
  • Individual high pressure/proof (HP) and individually magnetic particle inspection
  • Extractor from 4340, heat-treated and shot-peened
  • Ejector from S7 tool steel, heat-treated and shot-peened
  • Manganese phosphate finish

Carrier:

  • Machined from AISI 8620 steel
  • Full-auto M16 profile
  • Heat treated and Carburized/strain relieved
  • Precision ground gas key interface
  • Manganese phosphate finish with hard chrome interior
  • Gas key from 4130 steel with chrome interior, secured with staked Grade 8 fasteners

Misc:

  • Cam pin from 4340 chromoly steel, heat-treated
  • Firing pin from 8640 steel alloy, heat-treated, hard-chrome plated
  • Firing pin retaining pin from 1038 carbon steel, heat-treated

Click here to browse our entire selection of Bolt Carrier Groups & Parts.

5 reviews for Microbest Full-Auto M16 Bolt Carrier Group, Phosphate & Chrome-Lined

  1. Hugh Evans (verified owner)

    Great service from rooftop as always!! Microbest bcg doesn’t disappoint

  2. Flyby1971 (verified owner)

    Great BCG.

  3. andywangnn1117

    good

  4. erouse65

    BCM, SOLGW, & several other top AR manufactures rebrand this BCG for their weapons. Save your money and purchase this instead of a branded version of this BCG.

  5. Mike (verified owner)

    BCG is quality and Rooftop has been a pleasure to order from. Rooftop deserves five stars to.

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