Radical Firearms 5.56/300 Blk Melonite AR-15 Bolt Carrier Group - Gen 2

Manufactured by Radical Firearms
Manufactured by Radical Firearms
19 Reviews

In Stock

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The Radical Firearms 5.56/300 Blk Melonite AR-15 Bolt Carrier Group - Gen 2 is a top-quality component designed to enhance the performance and reliability of your AR-15 rifle. This bolt carrier group is crafted with precision and durability in mind, offering a range of features that make it an excellent choice. At the core of this bolt carrier group is its robust construction. The carrier is made from 8620 tool steel, known for its strength and resilience. The bolt is constructed from 9310 alloy steel, ensuring exceptional durability even in demanding conditions. To further reinforce its strength, the carrier and bolt undergo shot-peening, increasing their surface hardness and resistance to wear.

Reliability is of utmost importance in any firearm, and the Radical Firearms Gen 2 Bolt Carrier Group excels in this regard. Each bolt is equipped with an extractor booster, ensuring reliable cycling during rapid semi-auto or full-auto fire. The gas key is properly staked to prevent gas leakage and potential issues with short stroking. To guarantee exceptional quality, every assembly undergoes magnetic particle inspection, ensuring it is defect-free and capable of reliable performance.

The Radical Firearms 5.56/300 Blk Melonite AR-15 Bolt Carrier Group - Gen 2 is compatible with both 5.56 NATO and .300 Blackout calibers, making it versatile for various shooting preferences. Additionally, its durable and slick Melonite finish sets it apart. This unique surface treatment alters the steel, resulting in increased hardness and improved lubricity. The smooth finish facilitates easier cleaning and minimizes dirt and carbon buildup.


  • 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
See More


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
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

19 reviews

  • 4 stars
  • 0 reviews
  • 2 stars
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  • 1 star
  • 0 reviews

Am pleased


Bought bcg excellent shipping was better than expected product was flawless 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

Fit and Function to Spec.!!

by -

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

Does what it's supposed to

by -

I have this BCG on a 16" mid-length 5.56. I've shot about 1000 rounds with no malfunctions. Hard to beat this for the price point.

Just do it


I've have mine for 2-3 years now and have put it through multiple uppers and thousands of rounds. Good to see it's still at the same price as it was when I got it. The finish is showing some wear but it's still there and it's had a lot of use. I use 5 steel weights for a rifle length buffer and a non adjustable gas block on a 24" rifle length gas system barreled upper and it'll cycle steel case .223. I have 2 dlc coated carriers that couldn't do that, all bcg's were lubed. If you want something gucci then there's nothing wrong with that, if you want something that will work for a good price look no further.

Perfect mate with my RF 300 blk upper!

by -

I love the melonite coating on this BCG. It slide very smooth just like my high dollars Fail Zero with the EXO coating for about half of the price. Works flawlessly with my RF upper receiver.

Perfect BCG

by -

Got it on sale and it functioned flawlessly. Wouldn’t hesitate on purchasing again for another build. I definitely recommend.

Can't beat the value


I bought one of these a few years ago and several thousands of rounds ago. It all still looks good and is showing minor wear. Cam pin obviously has wear and the contacts on the carrier are showing wear. Don't spend the extra money on one of these companies that stamp a logo on a phosphate carrier and charge more. The army went to manganese phosphate not because it was better but because it was cheaper, save some money and try one of these. I'm pretty sure you'll get one, then try a new one and just go back to ol' reliable.

Pretty standard

by -

I gave it 5 stars because for what it is and what it costs you cannot beat it. The finish is non pourous so it easily wipes off compared to phosphate, maganese, or parkerized type finishes on a bcg. I am not qualified to speak on it other than it wipes clean and runs well.

All I asked for at this price point.

Nice Bolt

by -

I tried it and it is really good