Does the CMMG MK4 .223 Remington AR Lower work with the CMMG Resolute MK4 6mm ARC Upper?

CMMG MK4 .223 Remington AR Lower, Black - 55CA102AB

Lower Receiver

CMMG MK4 .223 Remington AR Lower

from $100.02

CMMG Resolute MK4 6mm ARC Upper with 16.1" Barrel, Black - 60B1091AB

Upper Receiver

CMMG Resolute MK4 6mm ARC Upper

from $682.74

CMMG lower and CMMG upper compatibility

Yes, they fit

The CMMG MK4 .223 Remington AR Lower works with the CMMG Resolute MK4 6mm ARC Upper. 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 CMMG lower and CMMG upper

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

Upper Receivers builders put on the CMMG MK4 .223 Remington AR Lower

Share of builds with the CMMG MK4 .223 Remington AR Lower and any upper

Lower Receivers builders put under the CMMG Resolute MK4 6mm ARC Upper

Share of builds with the CMMG Resolute MK4 6mm ARC Upper and any lower

  • CMMG MK4 .223 Remington AR Lower

    Of lower picks
    0.3%
    Median paid
    $99

  • CMMG Resolute MK4 6mm ARC Upper

    Of upper picks
    0.1%
    Median paid
    $680
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 CMMG lower and CMMG upper

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

Bolt Carrier Group

Trigger

Stock & Brace

Light

Charging Handle

Pistol Grip

Gas Block

Handguard

Barrel

Optic

CMMG MK4 .223 Remington AR vs CMMG Resolute MK4 6mm ARC: specs and prices

CMMG MK4 .223 Remington ARCMMG Resolute MK4 6mm ARC
Best price$100.02 at Classic Firearms$799.99 at Optics Planet
Stores3 of 7 in stock3 of 4 in stock
AssemblyStrippedComplete
PlatformAR-15AR-15
Caliber5.56 NATO6mm ARC
FinishCerakoten/a
ColorBlackn/a
Lengthn/a16.1

Both for $900.01 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.

CMMG MK4 .223 Remington AR Lower

CMMG Resolute MK4 6mm ARC Upper

Price history, last 90 days

  • CMMG MK4 .223 Remington AR Lower: lowest $94.69 on Jul 15, highest $126.99 on Jul 11 over the last 90 days.
  • CMMG Resolute MK4 6mm ARC Upper: lowest $682.74 on Jul 5, highest $949.95 on Sep 24 over the last 90 days.

Upper Receivers frequently paired with the CMMG MK4 .223 Remington AR Lower

Most picked next to it in real builds. Only parts our rules say fit the CMMG MK4 .223 Remington AR Lower are listed.

Lower Receivers frequently paired with the CMMG Resolute MK4 6mm ARC Upper

Most picked next to it in real builds. Only parts our rules say fit the CMMG Resolute MK4 6mm ARC Upper are listed.