Does the Aero Precision M4E1 Threaded Upper work with the Cryptic BCG?

Aero Precision M4E1 Threaded Complete Upper, 16" 5.56 Mid-Length Barrel w/ 15" ATLAS R-ONE M-LOK Handguard - FDE

Upper Receiver

Aero Precision M4E1 Threaded Upper

from $593.99

Cryptic Bolt Carrier Group BCG - Complete 6.5mm Grendel II Mystic Black

Bolt Carrier Group

Cryptic BCG

from $243.99

Aero Precision upper and Cryptic Coatings bolt carrier group compatibility

They fit, with a catch

The Aero Precision M4E1 Threaded Upper works with the Cryptic BCG, with one thing to check: Bolt Carrier Group (6.5 Grendel) has a 6.5 Grendel / 6mm ARC bolt; a 5.56 NATO build needs a 5.56 / .223 bolt.

No one has built this exact setup yet, but Aero Precision uppers with Cryptic Coatings bolt carrier groups 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 Aero Precision upper and Cryptic Coatings 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 Threaded Upper

Share of builds with the Aero Precision M4E1 Threaded Upper and any bolt carrier group

Upper Receivers builders put under the Cryptic BCG

Share of builds with the Cryptic BCG and any upper

  • Aero Precision M4E1 Threaded Upper

    Of upper picks
    2.3%
    Median paid
    $594

  • Cryptic BCG

    Of bolt carrier group picks
    0.1%
    Median paid
    $271
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 Cryptic Coatings bolt carrier group

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

Charging Handle

Lower Receiver

Trigger

Stock & Brace

Pistol Grip

Optic

Suppressor

Light

Aero Precision M4E1 Threaded vs Cryptic BCG: specs and prices

Aero Precision M4E1 ThreadedCryptic BCG
Best price$593.99 at AR15 Discounts$243.99 at Optics Planet
Stores0 of 2 in stock0 of 1 in stock
AssemblyCompleten/a
PlatformAR-15n/a
Gas System LengthMid-Lengthn/a
Caliber5.56 NATOn/a
Receiver TypeM4E1n/a
Length16n/a
Cartridgen/a6.5 Grendel
Finishn/aDLC

Both for $837.98 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 Threaded Upper

  • AR15 Discountsout of stock$593.99
  • Dirty Bird Industriesout of stock$624.99

Cryptic BCG

Price history, last 90 days

  • Aero Precision M4E1 Threaded Upper: lowest $593.99 on Jul 5, highest $624.99 on Jul 14 over the last 90 days.
  • Cryptic BCG: lowest $243.99 on Jul 21, highest $270.75 on Jul 5 over the last 90 days.

Bolt Carrier Groups frequently paired with the Aero Precision M4E1 Threaded Upper

Most picked next to it in real builds. Only parts our rules say fit the Aero Precision M4E1 Threaded Upper are listed.

Upper Receivers frequently paired with the Cryptic BCG

Most picked next to it in real builds. Only parts our rules say fit the Cryptic BCG are listed.