Does the Aero Precision M4E1 Threaded 11.5" 5.56 work with the FailZero Exo Coated?
Upper Receiver
Aero Precision M4E1 Threaded 11.5" 5.56 Carbine Upper
from $28.39
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 Threaded 11.5" 5.56 Carbine 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 Threaded 11.5" 5.56 and any bolt carrier group
- This pairFailZero Exo Coated7%
Share of builds with the FailZero Exo Coated and any upper
Aero Precision M4E1 Threaded 11.5" 5.56
- Of upper picks
- 0.1%
- Median paid
- $28
FailZero Exo Coated
- Of bolt carrier group picks
- 0.2%
- Median paid
- $133
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.
Charging Handle
Fits both
Stock & Brace
Pistol Grip
Lower Receiver
Unconfirmed
Barrel
Aero Precision M4E1 Threaded vs FailZero Exo Coated: specs and prices
| Aero Precision M4E1 Threaded | FailZero Exo Coated | |
|---|---|---|
| Best price | $28.39 at Sportsmans Outdoor Superstore | $128.52 at KY Gun Company |
| Stores | 0 of 3 in stock | 4 of 5 in stock |
| Assembly | Complete | n/a |
| Platform | AR-15 | n/a |
| Caliber | 5.56 NATO | n/a |
| Receiver Type | M4E1 | n/a |
| Length | 11.5 | n/a |
| Cartridge | n/a | 5.56 NATO |
| Style | n/a | AR-15 Bolt Carrier |
| Finish | n/a | Nickel Boron |
Both for $156.91 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 11.5" 5.56 Carbine
Price history, last 90 days
- Aero Precision M4E1 Threaded 11.5" 5.56: lowest $431.99 on Sep 4, highest $431.99 on Sep 4 over the last 90 days.
- FailZero Exo Coated: lowest $128.52 on Jul 5, highest $162.49 on Jul 7 over the last 90 days.
Bolt Carrier Groups frequently paired with the Aero Precision M4E1 Threaded 11.5" 5.56
Most picked next to it in real builds. Only parts our rules say fit the Aero Precision M4E1 Threaded 11.5" 5.56 are listed.
FAXON Firearms 7.62x39mm Type 1 Bolt
Fits, check noteCheck fit
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.
