Does the Aero Precision M4E1 Stripped 5.56mm work with the FailZero / Exo Coated?
Upper Receiver
Aero Precision M4E1 Stripped 5.56mm
from $110.99
Bolt Carrier Group
FailZero / Exo Coated
from $128.52
Aero Precision upper and FailZero bolt carrier group compatibility
Yes, they fit
The Aero Precision M4E1 Stripped 5.56mm works with the FailZero / Exo Coated. 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 FailZero bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the Aero Precision M4E1 Stripped 5.56mm and any bolt carrier group
- This pairFailZero / Exo Coated3%
Share of builds with the FailZero / Exo Coated and any upper
- This pairAero Precision M4E1 Stripped 5.56mm6%
Aero Precision M4E1 Stripped 5.56mm
- Of upper picks
- 0.3%
- Median paid
- $99
FailZero / Exo Coated
- Of bolt carrier group picks
- 0.2%
- Median paid
- $105
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 FailZero 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
Fits both
Charging Handle
Aero Precision Breach Small Levers
Fits both
Pistol Grip
Stock & Brace
Muzzle Device
Handguard
Daniel Defense MK18 RIS II Quad Rail
Fits both
Barrel
Aero Precision M4E1 Stripped vs FailZero / Exo Coated: specs and prices
| Aero Precision M4E1 Stripped | FailZero / Exo Coated | |
|---|---|---|
| Best price | $110.99 at Brownells | $128.52 at KY Gun Company |
| Stores | 0 of 4 in stock | 6 of 7 in stock |
| Assembly | Stripped | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Receiver Type | M4E1 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | M16 Bolt Carrier |
| Finish | n/a | Nickel Boron |
| Weight | n/a | 11.4 |
Both for $239.51 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
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.
- FailZero / Exo Coated: lowest $104.99 on Jul 6, highest $159.99 on Jul 7 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 FailZero / Exo Coated
Most picked next to it in real builds. Only parts our rules say fit the FailZero / Exo Coated are listed.
