Does the Aero Precision M4E1 Stripped 5.56mm work with the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT?

Aero Precision Ar-15 M4e1 Stripped Upper Receiver Black 5.56mm

Upper Receiver

Aero Precision M4E1 Stripped 5.56mm

from $110.99

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

Aero Precision upper and KAK Industry bolt carrier group compatibility

Yes, they fit

The Aero Precision M4E1 Stripped 5.56mm works with the KAK BCG 556 K-SPEC NP3 DE DOWNVENT BOLT C.... 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 Aero Precision 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 Aero Precision M4E1 Stripped 5.56mm

Share of builds with the Aero Precision M4E1 Stripped 5.56mm 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

  • Aero Precision M4E1 Stripped 5.56mm

    Of upper picks
    0.3%
    Median paid
    $99

  • 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 Aero Precision 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.

Lower Receiver

Trigger

Charging Handle

Pistol Grip

Stock & Brace

Gas Block

Muzzle Device

Handguard

Barrel

Optic

Aero Precision M4E1 Stripped vs KAK BCG 556 K-SPEC NP3 DE: specs and prices

Aero Precision M4E1 StrippedKAK BCG 556 K-SPEC NP3 DE
Best price$110.99 at Brownells$247.49 at BattleHawk Armory
Stores0 of 4 in stock0 of 1 in stock
AssemblyStrippedn/a
PlatformAR-15n/a
Caliber5.56 NATOn/a
Receiver TypeM4E1n/a
Cartridgen/a5.56 NATO
Stylen/aForged
Finishn/aNickel Boron

Both for $358.48 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.

Aero Precision M4E1 Stripped 5.56mm

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

  • BattleHawk Armoryout of stock$247.49

Price history, last 90 days

  • Aero Precision M4E1 Stripped 5.56mm: lowest $99.23 on Jul 6, highest $134.99 on Jul 12 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 Aero Precision M4E1 Stripped 5.56mm

Most picked next to it in real builds. Only parts our rules say fit the Aero Precision M4E1 Stripped 5.56mm 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.