Does the Radical Firearms 7.62x39 Heavy Barreled work with the Diamondback Firearms 5.56?

Radical Firearms 7.62x39 Heavy Barreled Ar-15 Upper - 12" Rpr Handguard - 16"

Upper Receiver

Radical Firearms 7.62x39 Heavy Barreled Upper

Diamondback Firearms 5.56 Ar-15 Bolt Carrier Group - Nitride

Bolt Carrier Group

Diamondback Firearms 5.56

Radical Firearms upper and Diamondback bolt carrier group compatibility

They fit, with a catch

The Radical Firearms 7.62x39 Heavy Barreled Upper works with the Diamondback Firearms 5.56, with one thing to check: Bolt Carrier Group (5.56 NATO) has a 5.56 / .223 bolt; a 7.62x39mm build needs a 7.62x39 bolt.

No one has built this exact setup yet, but Radical Firearms uppers with Diamondback bolt carrier groups are a common pairing.

Counted from real GunPartPicker builds: parts lists people put together while planning to buy.

Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.

Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.

How often builders pair the Radical Firearms upper and Diamondback bolt carrier group

Backed by thousands of qualified builds that have both an upper and a bolt carrier group.

Upper Receivers builders put under the Diamondback Firearms 5.56

Share of builds with the Diamondback Firearms 5.56 and any upper

  • Radical Firearms 7.62x39 Heavy Barreled

    Of upper picks
    0%
    Median paid
    n/a

  • Diamondback Firearms 5.56

    Of bolt carrier group picks
    0.8%
    Median paid
    n/a
How we count ⌄

These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.

Frequently built with the Radical Firearms upper and Diamondback bolt carrier group

The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.

Charging Handle

Gas Block

Lower Receiver

Trigger

Handguard

Muzzle Device

Barrel

Pistol Grip

Buffer Tube Assembly

Radical Firearms 7.62x39 Heavy vs Diamondback Firearms 5.56: specs and prices

Radical Firearms 7.62x39Diamondback Firearms 5.56
Best pricen/an/a
Storesn/an/a
AssemblyCompleten/a
PlatformAR-15n/a
Gas System LengthCarbinen/a
Caliber7.62x39mmn/a
Length12n/a
Cartridgen/a5.56 NATO
Stylen/aAR-15 Bolt Carrier
Finishn/aNitride
Weightn/a16.05

Bolt Carrier Groups most paired with Radical Firearms uppers

The Radical Firearms 7.62x39 Heavy Barreled is not in enough builds yet, so these are the most picked next to any Radical Firearms upper. Only parts our rules say fit the Radical Firearms 7.62x39 Heavy Barreled are listed.

Upper Receivers frequently paired with the Diamondback Firearms 5.56

Most picked next to it in real builds. Only parts our rules say fit the Diamondback Firearms 5.56 are listed.