Does the CMMG MK4 .223 Remington AR Lower work with the FN America FN 16 Mid-Length 5.56mm?

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

Lower Receiver

CMMG MK4 .223 Remington AR Lower

from $100.02

Fn Ar-15 M16 Barrel 16 Mid-Length 5.56mm

Barrel

FN America FN 16 Mid-Length 5.56mm

from $199.73

CMMG lower and FN America barrel compatibility

Yes, they fit

The CMMG MK4 .223 Remington AR Lower works with the FN America FN 16 Mid-Length 5.56mm. Our compatibility rules found no conflict between them.

This exact setup has been built more than once on GunPartPicker.

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 FN America barrel

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

Barrels builders put on the CMMG MK4 .223 Remington AR Lower

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

Lower Receivers builders put under the FN America FN 16 Mid-Length 5.56mm

Share of builds with the FN America FN 16 Mid-Length 5.56mm and any lower

  • CMMG MK4 .223 Remington AR Lower

    Of lower picks
    0.3%
    Median paid
    $99

  • FN America FN 16 Mid-Length 5.56mm

    Of barrel picks
    2.1%
    Median paid
    $200
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 FN America barrel

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

Pistol Grip

Charging Handle

Gas Block

Muzzle Device

Upper Receiver

Optic

Buffer Tube Assembly

Handguard

Light

CMMG MK4 .223 Remington AR vs FN America FN 16 Mid-Length: specs and prices

CMMG MK4 .223 Remington ARFN America FN 16 Mid-Length
Best price$100.02 at Classic Firearms$199.73 at KY Gun Company
Stores3 of 7 in stock7 of 8 in stock
AssemblyStrippedn/a
PlatformAR-15n/a
Caliber5.56 NATO5.56 NATO
FinishCerakoten/a
ColorBlackn/a
Gas Systemn/aMid-Length
Lengthn/a16
Twistn/a1:7
Contourn/aM4
Threadn/a1/2x28

Both for $299.75 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

FN America FN 16 Mid-Length 5.56mm

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.
  • FN America FN 16 Mid-Length 5.56mm: lowest $199.73 on Jul 11, highest $298.99 on Aug 26 over the last 90 days.

Barrels 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 FN America FN 16 Mid-Length 5.56mm

Most picked next to it in real builds. Only parts our rules say fit the FN America FN 16 Mid-Length 5.56mm are listed.