Radical Firearms 5.56/300 Blk Melonite Bolt Carrier Group - Gen 2

Manufactured by Radical Firearms
3 Reviews


In Stock

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The Radical Firearms 5.56 NATO / 300 BLK Gen 2 Bolt Carrier Group features an M16 pattern 8620 tool steel carrier with 9310 alloy steel bolt and shot-peened for increased surface strength and durability. Each bolt is equipped with an extractor booster to ensure reliable cycling during rapid semi-auto or full-auto fire. A properly staked gas key prevents gas leakage that can lead to short stroking. Each assembly is magnetic particle inspected to ensure it is free from defects that can lead to premature failures. If you are looking to build an affordable AR-15, this Radical Firearms Melonite bolt carrier group is a great option.

  • Carrier: 8620 tool steel
  • Bolt: 9310 alloy steel
  • Magnetic particle inspected
  • Durable and slick Melonite finish
  • Properly staked gas key
  • Compatible with 5.56 and .300 Blackout
  • M16 cut

Radical firearms manufactures a large variety of AR-15s, parts, and in a variety of different calibers, so you can either build or buy the rifle you are looking for. If you decide to go the build route, you can’t go wrong with this affordable 5.56 BCG. This 5.56 bolt carrier group comes with all the features you want in a reliable and long-lasting bolt carrier group including a Melonite finish. This type of finish goes through a process that physically changes the surface of the steel, increasing the hardness and overall lubricity. This leads to a long service life and less amount of time required to clean. The extremely smooth finish makes cleaning dirt and carbon much easier.


Bolt FinishSalt Bath Nitride
Bolt Material9310 Steel
BrandRadical Firearms
Caliber Gauge5.56 NATO
Carrier FinishSalt Bath Nitride
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedUntested
Magnetic Particle InspectMagnetic Particle Inspected

Ratings & Reviews

3 reviews

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Fit and Function to Spec.!!

by -

I had a few uppers that needed BCG's to complete so I bought 3.
<br>These BCG's fit and function to spec.
<br>5 Stars!!


by -

Built my first ar in .300 blackout paired with anderson upper staking on the gas key is perfect several hundred rounds including a box of subsonic, 0 malfunctions. I'm kinda new to the ar scene so I can't attest to different coatings however this melonite is crazy slippery and insanely easy to clean it resists dirt like you wouldn't believe I will be buying another for a second build soon

Am pleased


Bought bcg excellent shipping was better than expected product was flawless 5 stars