HOME > *** SALE *** > MAS DEFENSE >

M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - MELONITE NITRIDE
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT MELONITE NITRIDE BCG
 
MSRP: $120.00
Our Price: $99.99
SALE PRICE: $89.99

Stock Status: In Stock


Product Code: MAS00103208
Qty:

DESCRIPTION
 
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - MELONITE NITRIDE

Melonite Nitriding treatment turns a standard chrome moly steel barrel into a very lick, hard and corrosion resistant barrel. Unlike chrome lining, the Melonite process is a treatment done to the surface instead of adding a layer of material. This treatment is done to both the inside and outside of the BCG. The slick surface will never peel, is thicker than chrome lining, will not negatively affect accuracy as chrome lining does and will reduce the amount of friction created. Less friction equals less bore surface wear which will extend the barrel life. Another added benefit is carbon does not easily adhere to this surface making your cleaning job that much easier. This technology has been used by Glock, Springfield and Heckler & Koch for years and is gaining popularity as more companies are offering their products with this treatment.

  • Melonite Nitrite Treated
  • Bolt: MPI Tested Heat Treated and Shot Peened 9310 or C158
  • 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
  • Gas Key Screws: Grade 8 Properly Staked
  • Cam Pin: Precision Machined 4140 Steel
  • Retaining Pin: Precision bent and cut to length
  • Firing Pin: Stainless Steel
  • Assembled ready to drop in your AR15

RELATED ITEMS
MAS DEFENSE 15" NERO M-LOK FREE FLOAT - BLACK M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID NICKEL BORON 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
SALE PRICE: $89.99
SALE PRICE: $109.99
SALE PRICE: $289.99
SALE PRICE: $309.99
MAS DEFENSE 15" NERO M-LOK FREE FLOAT M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - NICKEL BORON AR-15 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

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 197 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 Excellent BCG for the money March 12, 2026
: Rodney Brown from Fort Worth, TX United States  
I have purchased several BCGs now from MAS Defense for 5.56 and 300BO builds and so far they have performed flawlessly. MD has excellent communication and they ship super fast. I will definitely be buying more bcgs from Mas in the future.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 BCG November 30, 2025
: Claudio Malicdem from Whittier , CA United States  
Heard great things about Melonie coating, can’t wait to use it.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 Nitride bcg November 15, 2025
: Tony Fisher from Euless, TX United States  
Sharp looking bcg with Mas Defense logo! Looks and appearance reflect quality!

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 Well built July 11, 2025
:  
Great bcg for the money

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 December 15, 2024
: Josh Bante from Harrison Township, MI United States  
Perfect smooth operation. Can actually “flick” the bolt to do a functions check right out of the box. I’ve had other BCGs in the past that were way too tight

Was this review helpful to you?

View All Customer Reviews