Radical Firearms 5.56/300 Black Melonite AR-15 Bolt Carrier Group - Gen 2
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Radical Firearms
Overview
The Radical Firearms 5.56/300 Blk Melonite AR-15 Bolt Carrier Group - Gen 2 is designed for reliable operation in 5.56 NATO caliber builds, featuring a robust M16 style bolt carrier that enhances cycling efficiency and stability. The nitride finish provides a durable surface that helps reduce friction and increase resistance to wear, making it a solid choice for builders seeking longevity in their components. This bolt carrier group is commonly found in mid-length gas system builds, pairing well with configurations that prioritize smooth operation and consistent performance.
Specifications
Radical Firearms 5.56/300 Black Melonite AR-15 Bolt Carrier Group - Gen 2
Available Merchants(1)
Prices checked
Price Alert
October 2026 on GunPartPicker
Radical Firearms 5.56/300 Black Melonite AR-15 Bolt Carrier Group - Gen 2 ranked #98 of the 258 bolt carrier groups builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #135 of the 546 bolt carrier groups builders have added. Builds with this bolt carrier group are mostly chambered in 5.56 NATO (92%, then 300 Blackout 8%), split between carbine-length (40%) and mid-length (40%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today the one retailer we track has it in stock. Prices barely moved in October 2026, holding around $99.85, with no real sale all month. Buying today, the lowest price is $99.85 at Primary Arms, which matches the best price we saw in October.
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Frequently Built With
The part most often added in each category by the builds that include this one
Radical Firearms Standard AR-15 Charging Handle
Radical Firearms 5.56 Socom Complete AR-15 Upper - Rpr M-LOK Handguard - 16"
Radical Firearms Complete AR-15 Lower Receiver With B5 Systems Stock & Grip
Fortis SHIFT Vertical Grip - M-LOK
SilencerCo Velos LBP 556 Rifle Suppressor, Black
PSA AR-15 Barrel 16" 5.56 NATO 1:7 Mid-Length Nitride - 77932227
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Radical Firearms 5.56/300 Blk Melonite Ar-15 Bolt Carrier Group - Gen 2
| Build | Parts | Total |
|---|---|---|
 | 11 | $563.49 |
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