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M16 MIL-SPEC MP BOLT CARRIER GROUP

M16 MIL-SPEC MP BOLT CARRIER GROUP Reviews & Ratings

Complete M16 Bolt Carrier Group:

  • Fully assembled Bolt Carrier Group; including the bolt, bolt carrier, gas key, firing pin, cam pin, and firing pin retaining pin
  • Every Bolt is Magnetic Particle Inspected (MPI)
  • The Bolt is machined from Carpenter 158 steel
  • Following machining, the Bolt is heat treated and shot peened
  • Installed extractor includes red o-ring with spring
  • M16 Bolt Carrier is machined from 8620 steel and hardened
  • Interior of Bolt Carrier Carrier Key & Bolt Carrier are chrome lined on the M16 Phosphate Bolt Carrier Group only
  • M16 Bolt Carrier will function in semi-auto or full-auto AR-15/M16
  • Gas Key Screws are properly torqued and staked
  • Bolt and Bolt Carrier feature a matte black mil-spec finish


SPECS: Bolt – Carpenter 158 steel, Magnetic Particle Inspected. Carrier – 8620 hardened steel, M16. Matte black phosphate finish.

See all of our AR15s and AR15 parts here.

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5
BCG
Good quality
Would you recommend this? Yes, I would recommend to a friend
by JEFFREY L. on June 25, 2026
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Was this review helpful? 0
5
Bolt carrier
So far so good haven’t shot yet but feels smooth
by Joshua O. on April 03, 2025
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Was this review helpful? 1
5
M16 Phosphate Bolt Carrier Group MP C158
The staking was well done....The carrier group works like a champ... didn't need to make any adjustments. I'm going to get another one for another rifle of mine.
by Zesla on August 17, 2021
Was this review helpful? 13
4
M16 bolt carrier
Fits and functions ok! Firing pin .0001 too long, but that might be error in my depth micrometer, or me using a Colt bolt instead of the one that came with it. Time will tell? Good chrome inside of the carrier key and bolt recess. It was staked on all sides, but not properly staked completely on all sides. I will stake the top like we did in the military.
Would you recommend this? Yes, I would recommend to a friend
by WILLIAM S. on September 18, 2025
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Was this review helpful? 2
4
Weak staking
My key staking was both weak and off center of the screw head. MP marking on bolt is laser etched. In hindsight, I should have just bought a Microbest brand carrier.
by Corey S. on October 04, 2024
Verified Purchase
Was this review helpful? 7