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

$125.00

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Assembled with Sprinco springs and inserts for longevity and reliability

(27 customer reviews)

47 in stock

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

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, manganese phosphate finish
  • Ejector from S7 tool steel, heat-treated and shot-peened
  • Hard chrome-plated finish

Carrier:

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

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.

27 reviews for Microbest Full-Auto M16 Bolt Carrier Group, Chrome & Phosphate Extractor

  1. Robert Maskos (verified owner)

    First off Rooftop is awesome. Now onto the BCG which was also awesome. Nice chrome job, nicely finished, good staking. Time will tell on longevity but with the way/amount i shoot they’ll bury me with it. Looking forward to picking up another when in stock and more noodles.

  2. grandpubba247 (verified owner)

    Quality part for inexpensive as you can get, so far no complaints!

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