Does the LBE Unlimited ARUPPER 5.56x45mm NATO work with the Radical Firearms 12.7x42mm Nitrided 4150?

LBE Unlimited ARUPPER AR-15 Upper Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Finish 0\" Barrel

Upper Receiver

LBE Unlimited ARUPPER 5.56x45mm NATO 7075-T6 Aluminum Finish

from $94.44

Radical Firearms 12.7x42mm Nitrided 4150 Ar-15 Barrel - 16"

Barrel

Radical Firearms 12.7x42mm Nitrided 4150

LBE Unlimited upper and Radical Firearms barrel compatibility

Yes, they fit

The LBE Unlimited ARUPPER 5.56x45mm NATO 7075-T6 works with the Radical Firearms 12.7x42mm Nitrided 4150. Our compatibility rules found no conflict between them.

This exact setup is in a real GunPartPicker build.

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 LBE Unlimited upper and Radical Firearms barrel

Backed by thousands of qualified builds that have both an upper and a barrel.

Barrels builders put on the LBE Unlimited ARUPPER 5.56x45mm NATO

Share of builds with the LBE Unlimited ARUPPER 5.56x45mm NATO and any barrel

Upper Receivers builders put under the Radical Firearms 12.7x42mm Nitrided 4150

Share of builds with the Radical Firearms 12.7x42mm Nitrided 4150 and any upper

  • LBE Unlimited ARUPPER 5.56x45mm NATO

    Of upper picks
    0.1%
    Median paid
    $94

  • Radical Firearms 12.7x42mm Nitrided 4150

    Of barrel picks
    0.2%
    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 LBE Unlimited upper and Radical Firearms barrel

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

Bolt Carrier Group

Handguard

Pistol Grip

Stock & Brace

Trigger

LBE Unlimited ARUPPER vs Radical Firearms 12.7x42mm: specs and prices

LBE Unlimited ARUPPERRadical Firearms 12.7x42mm
Best price$111.32 at KY Gun Companyn/a
Stores3 of 6 in stockn/a
AssemblyStrippedn/a
PlatformAR-15n/a
Caliber5.56 NATO.50 Beowulf
Gas Systemn/aCarbine
Lengthn/a10.5
Twistn/a1:20
Contourn/aHeavy
Threadn/a49/64x20

Today's best prices and 90 day price history

Every store we track for each part, cheapest in stock first. Prices are checked through the day.

LBE Unlimited ARUPPER 5.56x45mm NATO 7075-T6

Radical Firearms 12.7x42mm Nitrided 4150

No store lists it today.

Price history, last 90 days

  • LBE Unlimited ARUPPER 5.56x45mm NATO: lowest $93.53 on Jul 5, highest $124.99 on Sep 24 over the last 90 days.

Barrels frequently paired with the LBE Unlimited ARUPPER 5.56x45mm NATO

Most picked next to it in real builds. Only parts our rules say fit the LBE Unlimited ARUPPER 5.56x45mm NATO are listed.

Upper Receivers most paired with Radical Firearms barrels

The Radical Firearms 12.7x42mm Nitrided 4150 is not in enough builds yet, so these are the most picked next to any Radical Firearms barrel. Only parts our rules say fit the Radical Firearms 12.7x42mm Nitrided 4150 are listed.