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

Manufactured by Radical Firearms
Manufactured by Radical Firearms
13 Reviews
$79.99 $99.85

In Stock

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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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.
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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

13 reviews

  • 4 stars
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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.
<br>These BCG's fit and function to spec.
<br>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.
<br>All I asked for at this price point.

Nice Bolt

by -

I tried it and it is really good