Does the Radian Weapons Model 1 Builder KIT Flat work with the Daniel Defense 14.5" 5.56 M4A1 Upper?

Radian Weapons Model 1 Builder Kit Flat Dark Earth 5.56 14 MLOK Handguard

Lower Receiver

Radian Weapons Model 1 Builder KIT Flat Dark Earth 5.56 14

from $1359.70

Daniel Defense 14.5" 5.56 M4a1 Ar-15 Complete Upper - Flat Dark Earth

Upper Receiver

Daniel Defense 14.5" 5.56 M4A1 Upper

from $1544.00

Radian lower and Daniel Defense upper compatibility

Yes, they fit

The Radian Weapons Model 1 Builder KIT Flat Dark works with the Daniel Defense 14.5" 5.56 M4A1 Upper. Our compatibility rules found no conflict between them.

No one has built this exact setup yet, but Radian lowers with Daniel Defense uppers 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 Radian lower and Daniel Defense upper

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

Upper Receivers builders put on the Radian Weapons Model 1 Builder KIT Flat

Share of builds with the Radian Weapons Model 1 Builder KIT Flat and any upper

Lower Receivers builders put under the Daniel Defense 14.5" 5.56 M4A1 Upper

Share of builds with the Daniel Defense 14.5" 5.56 M4A1 Upper and any lower

  • Radian Weapons Model 1 Builder KIT Flat

    Of lower picks
    0%
    Median paid
    $1360

  • Daniel Defense 14.5" 5.56 M4A1 Upper

    Of upper picks
    1.6%
    Median paid
    $1499
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 Radian lower and Daniel Defense upper

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

Charging Handle

Trigger

Optic

Bolt Carrier Group

Stock & Brace

Suppressor

Pistol Grip

Light

Radian Weapons Model 1 Builder vs Daniel Defense 14.5" 5.56 M4A1: specs and prices

Radian Weapons Model 1Daniel Defense 14.5" 5.56
Best price$1359.95 at Brownells$1544.00 at Primary Arms
Stores2 of 4 in stock3 of 6 in stock
AssemblySetComplete
PlatformAR-15AR-15
Caliber5.56 NATO5.56 NATO
FinishCerakoten/a
ColorFDEn/a
Gas System Lengthn/aCarbine
Lengthn/a14.5

Both for $2903.95 at today's best prices.

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.

Radian Weapons Model 1 Builder KIT Flat Dark

Daniel Defense 14.5" 5.56 M4A1 Upper

Price history, last 90 days

  • Radian Weapons Model 1 Builder KIT Flat: lowest $1359.70 on Jul 5, highest $1579.99 on Aug 12 over the last 90 days.
  • Daniel Defense 14.5" 5.56 M4A1 Upper: lowest $1339.99 on Jul 21, highest $1621.00 on Aug 2 over the last 90 days.

Upper Receivers frequently paired with the Radian Weapons Model 1 Builder KIT Flat

Most picked next to it in real builds. Only parts our rules say fit the Radian Weapons Model 1 Builder KIT Flat are listed.

Lower Receivers frequently paired with the Daniel Defense 14.5" 5.56 M4A1 Upper

Most picked next to it in real builds. Only parts our rules say fit the Daniel Defense 14.5" 5.56 M4A1 Upper are listed.