Does the CMMG MK4/ Forward Assist Coyote Tan work with the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT?

CMMG Upper Receiver Assembly Mk4/AR15 Forward Assist Coyote Tan

Upper Receiver

CMMG MK4/ Forward Assist Coyote Tan

from $127.99

KAK AR15 BCG M16 556 K-SPEC NP3 DE DOWNVENT BOLT C...

Bolt Carrier Group

KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT C...

from $247.49

CMMG upper and KAK Industry bolt carrier group compatibility

Yes, they fit

The CMMG MK4/ Forward Assist Coyote Tan works with the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT C.... 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 upper and KAK Industry bolt carrier group

Backed by thousands of qualified builds that have both an upper and a bolt carrier group.

Bolt Carrier Groups builders put on the CMMG MK4/ Forward Assist Coyote Tan

Share of builds with the CMMG MK4/ Forward Assist Coyote Tan and any bolt carrier group

Upper Receivers builders put under the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT

Share of builds with the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT and any upper

  • CMMG MK4/ Forward Assist Coyote Tan

    Of upper picks
    0.1%
    Median paid
    $128

  • KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT

    Of bolt carrier group picks
    0.1%
    Median paid
    $247
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 upper and KAK Industry bolt carrier group

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

Barrel

Charging Handle

Trigger

Stock & Brace

Muzzle Device

Lower Receiver

Optic

Gas Block

Handguard

Pistol Grip

Buffer Tube Assembly

CMMG MK4/ Forward Assist vs KAK BCG 556 K-SPEC NP3 DE: specs and prices

CMMG MK4/ Forward AssistKAK BCG 556 K-SPEC NP3 DE
Best price$127.99 at Optics Planet$247.49 at BattleHawk Armory
Stores0 of 1 in stock0 of 1 in stock
AssemblyStrippedn/a
PlatformAR-15n/a
Cartridgen/a5.56 NATO
Stylen/aForged
Finishn/aNickel Boron

Both for $375.48 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/ Forward Assist Coyote Tan

KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT C...

  • BattleHawk Armoryout of stock$247.49

Price history, last 90 days

  • CMMG MK4/ Forward Assist Coyote Tan: lowest $123.99 on Aug 29, highest $129.99 on Jul 5 over the last 90 days.
  • KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT: lowest $247.49 on Jul 10, highest $247.49 on Jul 10 over the last 90 days.

Bolt Carrier Groups frequently paired with the CMMG MK4/ Forward Assist Coyote Tan

Most picked next to it in real builds. Only parts our rules say fit the CMMG MK4/ Forward Assist Coyote Tan are listed.

Upper Receivers frequently paired with the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT

Most picked next to it in real builds. Only parts our rules say fit the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT are listed.