Does the CMMG MK4 .223 Remington AR Lower work with the CMMG BANSHEE UPPER GROUP FIXED 9MM 8?

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

Lower Receiver

CMMG MK4 .223 Remington AR Lower

from $100.02

CMMG BANSHEE UPPER GROUP FIXED 9MM 8 BLK

Upper Receiver

CMMG BANSHEE UPPER GROUP FIXED 9MM 8

from $740.26

CMMG lower and CMMG upper compatibility

They fit, with a catch

The CMMG MK4 .223 Remington AR Lower works with the CMMG BANSHEE UPPER GROUP FIXED 9MM 8, with one thing to check: Lower Receiver (.223 Wylde / 5.56 NATO / Multi) needs a 9mm magazine well adapter for a PCC/9mm build.

No one has built this exact setup yet, but CMMG lowers with CMMG 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 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

  • CMMG MK4 .223 Remington AR Lower

    Of lower picks
    0.3%
    Median paid
    $99

  • CMMG BANSHEE UPPER GROUP FIXED 9MM 8

    Not in enough builds yet to report.

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.

Stock & Brace

Light

Trigger

Charging Handle

Pistol Grip

Gas Block

Handguard

Optic

CMMG MK4 .223 Remington AR vs CMMG BANSHEE UPPER GROUP FIXED: specs and prices

CMMG MK4 .223 Remington ARCMMG BANSHEE UPPER GROUP
Best price$100.02 at Classic Firearms$849.99 at Primary Arms
Stores3 of 7 in stock1 of 3 in stock
AssemblyStrippedComplete
PlatformAR-15AR-9
Caliber5.56 NATO9mm
FinishCerakoten/a
ColorBlackn/a
Gas System Lengthn/aBlowback
Lengthn/a8

Both for $950.01 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 BANSHEE UPPER GROUP FIXED 9MM 8

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 BANSHEE UPPER GROUP FIXED 9MM 8: lowest $740.26 on Jul 5, highest $849.99 on Jul 7 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 most paired with CMMG uppers

The CMMG BANSHEE UPPER GROUP FIXED 9MM 8 is not in enough builds yet, so these are the most picked next to any CMMG upper. Only parts our rules say fit the CMMG BANSHEE UPPER GROUP FIXED 9MM 8 are listed.