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M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID NICKEL BORON
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - NICKEL BORON AR-15
 
MSRP: $150.00
Our Price: $139.99
SALE PRICE: $99.99

Stock Status: In Stock


Product Code: MAS00103210
Qty:

DESCRIPTION
 
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID NICKEL BORON

Nickel Boron has proven itself to be the most durable finish on the market. It's so good that it's being adopted by the Military and many Government agencies. It will never chip, peal, or flake off. It's much smoother than Hard Chrome, it's easier to clean and you can run it almost lube free for thousands of rounds due to it's self lubricating properties. These BCG's are a huge improvement over a Phosphated BCGs. They are even an improvement over Hard Chrome.

Properties:
  • Nickel Boron Plating
  • Bolt: MPI Tested Heat Treated and Shot Peened 9310 or C158 Nitride
  • Extractor: Precision Machined Heat Treated and Shot Peened Billet
  • Gas Rings: Stainless Steel per Mil-Spec
  • Carrier: M16 Profile Carrier 8620
  • Gas Key: 4140 Steel Nitride
  • Gas Key Screws: Grade 8 Properly Staked
  • Cam Pin: Precision Machined 4140 Steel Nitride
  • Retaining Pin: Precision bent and cut to length
  • Firing Pin: Stainless Steel
  • Assembled ready to drop in your AR15

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16" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL 16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 15" M-LOK RAIL - MID LENGTH GAS AR-15 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT MELONITE NITRIDE BCG MAS DEFENSE 15" NERO M-LOK FREE FLOAT
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - MELONITE NITRIDE
SALE PRICE: $79.99
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT MELONITE NITRIDE BCG

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 171 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 Bcg January 7, 2026
: Martin Chapman from Haughton , LA United States  
It was exactly what I ordered and the service was prompt I will order and recommend

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  0 of 0 people found the following review helpful:
 
5 of 5 Bcg December 25, 2025
: ANDREW HOSTIUCK from Cincinnati, OH United States  
So slick
Love eet.

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  0 of 0 people found the following review helpful:
 
5 of 5 Slick bolt! July 30, 2025
: Scott C from Suwanee, GA United States  
Owned many AR platforms and had a few fancy bolts, but this is clearly high quality.  I would say it feels slippery.  I added a tiny amount of Slip EWL 2000 and its functioning great.  Cleaning carbon is a breeze.  It included an O-ring under the extrator so it grabs and removes brass with ease.  Always a great experience ordering from MAS.  Buy with confidence.

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  0 of 0 people found the following review helpful:
 
5 of 5 Awesome quality March 27, 2025
: Justin Peters from Stafford, VA United States  
Mas Defense produce some of the best nickel boron BCGs. I have a AR10 AND AR15 BCG from Mass Defense. With their quality in their BCGs, I could only imagine and wish for them to produce barrels, uppers and lowers. Customer service is awesome and shipping is packaged great and fast. Can't beat the price for their quality. Thanks Mas Defense.

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  0 of 0 people found the following review helpful:
 
5 of 5 December 26, 2024
: Jason Wass from Pahrump, NV United States  
Bolt was as advertised A++

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